Principles of Counting

合集下载

Principles of measurement Biomedical engineering 测量原理生物医学工程

Principles of measurement   Biomedical engineering 测量原理生物医学工程

Blood suspension
Manometer
SYSMEX EUROPE GMBH
Principles and Technology
DC Detection Method
Absolute Counting I
Pulse Picture
Volume [fl]
Pulses / Volume
Prerun
Time [sec]
Afterrrun
Counting Time (defined Volume)
Transducer
Start-Sensor Stop-Sensor
Blood suspension
Manometer
SYSMEX EUROPE GMBH
Principles and Technology
Histogram
1 2 3 4 5 6 7 8 9 10 11 12 13 14
4 1 0 0 0 1 2 3 4
5 4 3 2 1
SYSMEX EUROPE GMBH
Principles and Technology
DC Detection Method
Histogram
Erythrocyte Histogram
SYSMEX EUROPE GMBH
Principles and Technology
DC Detection Method
Transducer
Internal Electrode
Aperture
External Electrode
Vacuum
SYSMEX EUROPE GMBH
Principles and Technology
Internal Electrode Aperture External Electrode

打开数字的英文作文

打开数字的英文作文

打开数字的英文作文Title: Exploring the Significance of Numbers in Everyday Life。

Numbers are the fundamental building blocks of the universe, governing every aspect of our existence from the grandeur of galaxies to the intricacies of subatomic particles. They serve as the language through which we comprehend the world around us, enabling us to quantify, analyze, and understand phenomena that range from the mundane to the extraordinary. In this essay, we delve into the multifaceted significance of numbers in our daily lives, exploring their role in various domains and their profound impact on human civilization.To begin with, numbers are indispensable tools in the realm of mathematics, serving as the foundation upon which mathematical theories and principles are constructed. From the simplicity of counting to the complexity of calculus, numbers provide the framework for solving equations,modeling natural phenomena, and unlocking the mysteries of the universe. Without numbers, the vast edifice of mathematics would crumble, rendering fields such as physics, engineering, and economics virtually incomprehensible.Moreover, numbers play a crucial role in communication and commerce, facilitating transactions, measurements, and exchanges of information on a global scale. Whether we are discussing the price of goods, the dimensions of a building, or the coordinates of a location, numbers serve asuniversal symbols that transcend language barriers and cultural differences. In the digital age, where data drives decision-making and technological innovation, the abilityto manipulate and interpret numbers is essential forsuccess in virtually every sector of the economy.Beyond their practical utility, numbers also possess symbolic and cultural significance that permeates various aspects of human society. In many cultures, certain numbers are imbued with auspicious or ominous meanings, influencing beliefs, traditions, and rituals. For example, the number seven is often associated with luck and spirituality inmany societies, while the number thirteen is viewed as unlucky in Western superstition. Furthermore, numbersfeature prominently in art, literature, and religion, serving as metaphors for concepts such as infinity, perfection, and transcendence.In addition to their symbolic and cultural connotations, numbers have profound psychological effects on the human mind, shaping our perceptions, behaviors, and decision-making processes in subtle ways. Research in cognitive psychology has revealed that humans have an innate tendency to assign numerical values to objects and events, a phenomenon known as "numerical cognition." Moreover, numerical illusions and biases, such as the "anchoring effect" and the "Gestalt law of proximity," demonstrate how numbers can influence our judgments and interpretations of reality.Furthermore, numbers hold a special significance in the context of time, serving as markers of temporal progression and historical continuity. The concept of chronological time, with its division into seconds, minutes, hours, days,and years, is an essential aspect of human civilization, enabling us to organize our lives, record our achievements, and reflect on the passage of time. Moreover, the use of numerical calendars and timelines allows us to contextualize historical events, chart the course of evolution, and envision the future trajectory of humanity.In conclusion, numbers are not merely abstract entities but integral components of our everyday experience, shaping our perceptions, actions, and understanding of the world. From the elegance of mathematical equations to the symbolism of cultural rituals, numbers permeate every aspect of human existence, enriching our lives with their infinite complexity and profound significance. As we navigate the complexities of modern society, let us recognize and appreciate the indispensable role that numbers play in illuminating the mysteries of the universe and charting the course of human civilization.。

手术室物品清点PPT

手术室物品清点PPT
LOGO
OPERATING ROOM ITEMS
手术室物品清点
手术室护理实践指南培训PPT课件
手术室物品清点培训目的:识记手术物品清点时机和原则;理解手术物品清 点方法;运用各类手术中严格执行手术清点制度。
讲述人:XXX
日期:20××.××.××
CONTENTS
01 手术清点目的 Surgical inventory purpose
手术清点意外情况的处理
物品数目及完整性清点有误时,立即报告手术医 生共同寻找缺失的部分或物品,必要时根据物品 性质采取相应辅助手段查找,确保不留在患者体 内。
手术清点意外情况的处理
若找到缺失的部分和物品时,洗手护士与巡回护 士应确认其完整性,并放于指定位置,妥善保存, 以备清点时核查。
如采取各种手段仍未找到,应立即报告主刀医生 及护士长,X线辅助确认不在患者体内,需主刀 医生、洗手护士、巡回护士签字、存档,按清点 意外处理流程报告,填写清点意外报告表,并向 上级领导报告。
手术物品清点注意事项
01
巡回护士需检查手术间环境,不 得遗留上一台手术患者任何物品
03
清点时,洗手护士与巡回护士须 双人查对手术物品的数目及完整
性前15-30分钟上台, 保证有充分的时间进行物品的检 查和清点
04
严禁用器械或敷料等物品作他用, 术中送冰冻切片、病理标本时, 严禁用纱布等包裹纱布
02 手术清点时机 Surgery to count the timing
03 手术物品清点 Inventory of surgical items
04 手术清点原则 Principles of surgical inventory
05 清点注意事项 Inventory considerations

关于数学的英语歌

关于数学的英语歌

Title: The Beauty of MathematicsMathematics, often regarded as the universal language, encompasses a multitude of concepts and principles that form the foundation of our understanding of the world. From the simplicity of counting numbers to the complexity of advanced calculus and abstract algebra, mathematics holds a mesmerizing beauty that transcends cultures and time. In this document, we will explore the elegance and significance of mathematics through a collection of English songs dedicated to this remarkable subject.1. “Count on Me” by Bruno Mars“Count on Me” by Bruno Mars is a warm and uplifting song that highlights the importance of friendship and support. While the imagery in the song may not explicitly refer to mathematics, the underlying theme can be related to the concept of counting and relying on someone. Just as we count on our friends, mathematics allows us to count, quantify, and make sense of the world around us.2. “Symmetry” by M.C. EscherMathematics and art have been intertwined throughout history, and M.C. Escher’s work exemplifies this connection. Although “Symmetry” is not a song in the traditional sense, it can be interpreted as a visually rhythmic composition. In this piece, Escher explores the concept of symmetry, showcasing its harmony and balance. Mathematical principles such as reflection and rotation symmetry are embedded within Escher’s intricate designs, creating a mesmerizing and thought-provoking visual representation of mathematical concepts.3. “Fibonacci Sequence” by Adam HarpazThe Fibonacci sequence is a fascinating mathematical pattern where each number is the sum of the two preceding ones. This sequence can be found in various natural phenomena, such as the spiral arrangement of a sunflower’s seeds or the shape of a seashell. Adam Harpaz’s song “Fibonacci Sequence” celebrates this spiraling pattern, highlighting the beauty of nature’s intrinsic connection to mathematics. The lyrics, combined with a melodic chorus, evoke a sense of wonder and appreciation for the underlying mathematical order present in the world around us.4. “Geometry” by They Might Be GiantsGeometry, a fundamental branch of mathematics, explores the properties and relationships of shapes, lines, and angles. “Geometry” by They Might Be Giants playfully introduces young learners to the concept of geometry in a fun and engaging way. Through clever wordplay and catchy melodies, the song teachesabout different geometric shapes such as parallelograms, rectangles, and triangles. This playful approach to learning mathematics makes it accessible and enjoyable for students, fostering a love for the subject.5. “Pi” by Kate Bush“Pi” by Kate Bush is a hauntingly beautiful song that delves into the mysterious and infinite nature of the mathematical constant π. The lyrics weave together mathematical concepts, historical events, and personal reflections, creating a mesmerizing composition. The song showcases the enigmatic allure of mathematics and its ability to transcend rationality, inspiring awe and wonder in both mathematicians and non-mathematicians alike.6. “Math” by The Naked Brothers Band“Math” by The Naked Brothers Band is a lighthearted and upbeat song that emphasizes the practicality and everyday relevance of mathematics. The lyrics playfully highlight how math is integrated into daily activities, from counting money to measuring time. By infusing humor and relatability, the song aims to break the stereotype that mathematics is an abstract and disconnected subject, showcasing its applicability in various aspects of life.In conclusion, mathematics possesses a captivating beauty that extends beyond numbers and equations. Through the power of music, these English songs offer a unique perspective on the elegance, practicality, and intrinsic connection between mathematics and various aspects of our world. By appreciating the beauty of mathematics, we can build a deeper understanding and cultivate a genuine love for this remarkable subject.。

审计英文词汇整理

审计英文词汇整理

overall financial statement level and in related account balances and transaction levels 财务报表层和相关账户、交易层or omissions 错报或漏报总计events 期后事项the financial statements 调整财务报表additional audit procedures 实施追加的审计程序risk 审计风险risk 检查风险audit opinion 不适当的审计意见misstatement 重大的错报misstatement 可容忍错报acceptable level of detection risk 可接受的检查风险level of material misstatement risk 重大错报风险的评估水平business 小规模企业system 会计系统of control 控制测试test 穿行测试沟通流程图of internal control 重新执行evidence 审计证据procedures 实质性程序认定存在发生完整性obligations 权利和义务allocation 计价和分摊截止准确性分类检查of counting 监盘观察函证计算procedures 分析程序核对追查sampling 审计抽样误差error 预期误差总体risk 抽样风险risk 非抽样风险unit 抽样单位sampling 统计抽样error 可容忍误差of under reliance 信赖不足风险 of over reliance 信赖过度风险 of incorrect rejection 误拒风险risk of incorrect acceptance 误受风险 trial balance 试算平衡表cross-referencing 索引和交叉索引现金收入disbursement 现金支出statement 银行对账单reconciliation 银行存款余额调节表sheet date 资产负债表日value 可变现净值room仓库invoice 销售发票list 价目表confirmation request 积极式询证函confirmation request 消极式询证函requisition 请购单report 验收报告margin 毛利overhead 制造费用requisition 领料单存货盘点certificate 债券certificate 股票report 审计报告被审计单位of the audit report 审计报告的收件人 opinion 无保留意见opinion 保留意见of opinion 无法表示意见 opinion 否定意见审计词汇审计法 Audit Law, Audit Act审计法实施条例 the Implementary Rules of the Audit law审计标准 audit criteria,audit standard审计准则 auditing standard审计原则 auditing principles审计手册 audit manual公认审计准则 Generally Accepted Auditing Standards审计法律规范 audit laws and regulations审计体制 audit system审计权限 audit purview; audit jurisdiction;audit mandate审计职责 audit responsibility审计监督 audit supervision; supervision through auditing审计管辖权 audit jurisdiction审计执法 implementation of audit laws and regulations审计处理 audit sanction审计处罚 audit penalty依法审计 conduct auditing in accordance with laws审计意见 audit opinion审计决定 audit decision审计建议 audit suggestion, audit recommendation复核意见 conclusion of audit review 审计复议 audit appeal审计听证 audit hearing审计复核 audit review审计战略 audit strategy审计计划 audit plan审计方案 auditing program审计目标 auditing objective审计范围 audit scope审计内容 audit coverage审计结论 audit conclusion审计任务 audit assignments审计结果 audit finding审计报告 audit report审计方法 audit method审计过程 auditing process审计证据 audit evidence审计测试 audit test审计风险 audit risk审计抽样 audit sampling审计软件 audit software审计程序 auditing procedures审计调查 audit investigation审计小组 audit team审计线索 audit trail工作底稿 working paper 绕过计算机审计 auditing around the computer 通过计算机审计 auditing through the computer 计算机辅助审计 computer-assited audit信息技术审计 IT audit合法性审计 compliance audit, regularity audit 合规性审计 compliance audit综合审计 comprehensive audit效益审计 value for money audit (VFM audit)绩效审计 performance audit财务审计 financial audit财务报表审计 financial statement audit财务收支审计 audit of financial revenues and expenditures决算审计 final account audit经济责任审计 accountability audit任中经济责任审计 middle term accountability audit离任经济责任审计 term-end accountability audit管理审计 management audit项目审计 project audit外部审计 external audit内部审计 internal audit政府审计 government audit联合审计 joint audit实地审计 field audit期末审计 final audit期中审计 interim audit定期审计 periodic audit初次审计 initial audit初步审计 preliminary audit事后审计 post-audit事前审计 pre-audit事中审计 concurrent audit专项审计 special audit法定审计 statutory audit后续审计 successive audit跟踪审计 follow up audit全过程审计 whole process auditing突击审计 surprise audit审计报告 audit report标准报告 standard report长式报告 long-form report短式报告 short-form report审计工作报告 audit working report审计结果公告 Announcement of Audit Findings 审计长 Auditor General副审计长 Deputy Auditor General审计主任 chief auditor资深审计师 senior auditor审计师(员) auditor注册内部审计师 certified internal auditor (CIA)注册信息系统审计师 certified information systems auditor(CISA)注册公共会计师 certified public accountant (CPA)特许会计师 chartered accountant(CA)审计经费 audit funds审计业务费 audit operating expense审计专项经费 special funds for auditing无保留意见:unqualified opinion保留意见 qualified opinion无法表示意见: disclaimer of opinion否定意见:adverse opinion。

小学上册第8次英语第二单元寒假试卷

小学上册第8次英语第二单元寒假试卷

小学上册英语第二单元寒假试卷英语试题一、综合题(本题有100小题,每小题1分,共100分.每小题不选、错误,均不给分)1.What is 12 - 4?A. 6B. 7C. 8D. 92.What is the process of water turning into vapor called?A. EvaporationB. CondensationC. PrecipitationD. SublimationA Evaporation3.The ____ loves to jump and is very playful.4.What do we call the outer layer of the Earth?A. CoreB. MantleC. CrustD. AtmosphereC5.What do you call a long, narrow body of water?A. LakeB. RiverC. OceanD. Sea6.What do you call a story that is made up?A. FictionB. Non-fictionC. BiographyD. True story7.The __________ is a famous mountain range in Italy. (阿尔卑斯山)8.My teacher is very __________ (耐心).9.What do you call a young pig?A. CalfB. PigletC. LambD. Foal10.I like to go ______ during the weekend.11.I like to eat ______ for breakfast.12.The boy has a cool ________.13.The __________ (历史的回望) reflects identity.14.She likes to _____ (swim/climb).15.The capital of Guyana is __________.16.What is the name of the toy that can be spun on the ground?A. Yo-yoB. TopC. BallD. KiteB17. A _______ can help to demonstrate the principles of thermodynamics.18.What do you call an animal that can live both in water and on land?A. FishB. MammalC. AmphibianD. ReptileC19. A ____ is often seen chasing after balls.20.What is the capital of France?A. LondonB. BerlinC. ParisD. RomeC21.The ________ (solution) solves the problem.22.What is the main source of energy for the Earth?A. WindB. WaterC. SunD. CoalC23.What do you call a picture taken with a camera?A. ImageB. DrawingC. PaintingD. SketchA24.ssance was a time of great ________ in art and science. The Rena25.The main language spoken in Brazil is ________ (巴西主要讲的语言是________).26.The capital of the Philippines is ________.27.What is the main gas that we breathe?A. OxygenB. Carbon DioxideC. HydrogenD. NitrogenA28.What do we call the practice of raising animals for food?A. AgricultureB. HorticultureC. Animal husbandryD. ForestryC Animal husbandry29.What do we call a place where you can see many butterflies?A. GardenB. ConservatoryC. Butterfly houseD. All of the above30.The first successful airplane flight took place in _______.31.The __________ (历史的实用性) informs policy-making.32.I like to ___ (help) with chores.33.indigenous people) are the original inhabitants of an area. The ____34.My favorite dessert is ______. (cake)35.The process of ______ can create sedimentary layers in rocks.36.The _____ (greenery) is lush and vibrant.37.The __________ is essential for understanding the Earth's climate system.38.The _______ of a wave can be seen in the ocean.39.My aunt is a ______. She helps people feel better.40.Hubble's law explains the expansion of the ______.41.Which vehicle runs on tracks?A. CarB. BusC. TrainD. BicycleC42.Which vegetable is orange?A. BroccoliB. CarrotC. SpinachD. PotatoB43.The blue jay is a type of _________. (鸟)44.What is the name of the famous American singer known for her role in "The Wizard of Oz"?A. Judy GarlandB. Marilyn MonroeC. Audrey HepburnD. Grace KellyA Judy Garland45. A _______ is a type of reaction that produces a gas.46.My grandma makes the best _______ (汤).47.The __________ (历史的声音) is powerful.48.The ________ is very wise and observant.49.The __________ (历史的推动) inspires change.50.The teacher assigns interesting _____ (项目) for students.51.The Earth's layers include the crust, mantle, outer core, and ______ core.52.Caterpillars eat a lot before becoming ______.53.My sister enjoys __________ (做实验) in science.54.My ________ (父母) always support me in my activities.55.What do you call the area of land that is used for farming?A. FieldB. FarmC. RanchD. GardenB56.The __________ is beautiful when covered with snow. (大地)57.My __________ (玩具名) is really __________ (形容词) to play with.58.What do you call the person who studies rocks?A. BiologistB. GeologistC. ChemistD. Physicist59.We have a ______ (愉快的) family day every month.60.The opossum plays dead to avoid ______ (捕食者).61.The ______ has a strong sense of smell.62. A ____ is known for its hopping abilities.63.Which fruit is green on the outside and red on the inside?A. KiwiB. WatermelonC. GrapesD. PeachB Watermelon64.The ____ has a unique pattern and runs fast.65.We have ______ at the picnic. (sandwiches)66.Rocks come in three main types: igneous, __________, and metamorphic.67.What do we call the person who flies an airplane?A. PilotB. EngineerC. CaptainD. Navigator68.How many sides does a hexagon have?A. 5B. 6C. 7D. 869.What is 9 3?A. 4B. 5C. 6D. 7B70.Bubbles forming in a solution may indicate a ________ reaction.71.The tree is very ________.72.My cousin is a ______. She loves to volunteer at shelters.73.The _____ (果实成熟) is a sign that it’s time to harvest.74.I like to fly ______ (kites) in the park.75. A _____ (小羊) has soft, fluffy wool.76.I enjoy cooking ______ (美味) meals to share with my family.77.The manatee is sometimes referred to as a sea ______ (牛).78.The __________ (印加帝国) was located in South America.79.I want to be a ______ (doctor) when I grow up.80.The butterfly will soon become a beautiful ______ (成虫).81.They are watching ________ (电视) together.82.My ________ (玩具) is fun to play with alone or with friends.83.What is the main source of light for Earth?A. StarsB. MoonC. SunD. FireC84.The _____ (donkey) is braying.85.The _____ (花束) is a gift for special occasions.86.What is 30 10?A. 20B. 25C. 15D. 5A87.The ______ loves exploring new ideas.88. A chemical that increases the rate of a reaction without being consumed is a ______.89.Which instrument has strings and is played with a bow?A. GuitarB. ViolinC. DrumsD. FluteB90.Which vegetable is orange and long?A. PotatoB. CarrotC. TomatoD. CucumberB91.What do you call the first ten numbers in counting?A. Prime NumbersB. Even NumbersC. Natural NumbersD. Whole NumbersC92.What do you call the sound a cow makes?A. BarkB. MeowC. MooD. Roar93. A space probe is a ______ that travels through space.94.The __________ (江河) provide water for many people.95.I love playing __________ during recess with my friends.96.What do we call a baby dog?A. KittenB. PuppyC. CubD. FoalB97.What is the main ingredient in sushi?A. NoodlesB. RiceC. BreadD. Chicken98.What is the capital of Lesotho?A. MaseruB. TeyateyanengC. MafetengD. Mohale's HoekA99.The ______ (金鱼) swims around happily in its bowl.100.The Earth's surface is shaped by the forces of ______ and erosion.。

离散数学课件(英文版)----Counting

离散数学课件(英文版)----Counting
– p(A) = 2n. Why?
• 加法原则
– 一件事情有两种做法,第一种做法有n种方式,第二种 做法有m种方式,则完成这件事情共有m+n种方法 – 定义标识符:由字符开头的8位字符数字串或者一位字 符。共有多少个合法标识符? – 含数字1的小于10000的正整数个数
Permutations
• Problem 1:
• In General:
– Order matters => permutation – Order does not matter =>combination
Pigeonhole Principle
• If n pigeons are assigned to m pigeonholes, and m<n, then at least one pigeonhole contains two or more pigeons.
– Proof by contradiction: Suppose each pigeonhole contains at most 1 pigeon. Then at most m pigeons have been assigned. Since m<n, so n-m>0, there are (n-m) pigeons have not been assigned. It’s a contradiction.
集合的等势关系
• 等势关系的定义:
– 如果存在从集合A到集合B的双射,则称集合A 与B等势。 – 集合A与B等势记为:AB, 否则A≉B – AB意味着:A,B中的元素可以“一一对应”。 – 要证明AB,找出任意一个从A到B的双射即可。
• “等势”的集合就被认为是“一样大”

离散数学英文版PPT

离散数学英文版PPT
– I is given in the semester and not made up by the end of the next semester
How I Can Help You
• If you have a question, you can ask me face-to-face
Prerequisite and Description
• Prerequisite: MATH 170 Calculus I and CSCI 185 Programming II • Description: An introduction to discrete structures with applications to computing problems. Topics include logic, sets, functions, relations, proof techniques and algorithmic analysis. Graph theory and trees may be studied as well
Course Objectives
1. Relate practical examples to the appropriate set, function, or relation model, and interpret the associated operations and terminology in context 2. Apply proof techniques, including logic, to problems 3. Differentiate between dependent and independent events 4. Apply the binomial theorem to independent events and Bayes’ theorem to dependent events, and solve problems such as Hashing 5. Relate ideas of mathematical induction(归纳) to recursion and apply it to problems in computer science setting 6. Apply the basic counting principles, permutations and combinations to problems in computer science setting 7. Implementing algorithms in C or C++ programs
  1. 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
  2. 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
  3. 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。
Name
Date
Principles of Counting
Objective: To find the total possible number of arrangements (ways) an event may occur.
a) Identify the number of parts (Area Codes, Zip Codes, License Plates, Password, Short Melodies) b) Start with the most restricted part and write the number of possible choices. c) Write the number of choices for other parts d) Multiply all the numbers.
3) How many different ZIP codes are possible with no zero at the beginning? D D D D D = 9 ×10 ×10 ×10 ×10 =90, 000
4) How many different 7- part license plates are possible with one digit first, 3 letters after followed by another 3 digits?
2. How many ways can 5 paintings be line up on ቤተ መጻሕፍቲ ባይዱ wall?
3. Rob has 4 shirts, 3 pairs of pants, and 2 pairs of shoes that all coordinate. How many outfits can you put together?
Name
Date
Worksheet A2 : Fundamental Counting Principle, Factorials, Permutations Intro
1. A restaurant offers four sizes of pizza, two types of crust, and eight toppings. How many possible combinations of pizza with one topping are there?
5× 6 × 6 × 3 =540 Hint: To be 4- digit zero can not be used as the first digit, and to be an even number the last number can be 0,6,8, that give us 3 choices.
8) How many different types of pizza with three toppings can we order, if we have 4 choices of size, two choices of thickness, and 8 choices of toppings. S Th T1 T2 T3
4. Grace loves to eat salad! How many salads can she put together if she can pick out one type of lettuce from 2 choices, one vegetable from 4 choices and one dressing from 7 choices?
7) How many different types of pizza with two toppings can we order, if we have 4 choices of size, two choices of thickness, and 8 choices of toppings. S Th T1 T2 4 × 2 × 8× 7 =448
4 × 2 × 8 × 7 × 6 =2, 688
9) How many different 8-note melodies can be made by a 44-key keyboard? 448 = 14, 048, 223, 625, 220
10) How many different 4- digit even numbers can we write with (0,5,6,3,8,7)? DD D D
1) How many different PIN numbers codes are possible?
D D D D = 10 ×10 ×10 ×10 = 10, 000
2) How many different ZIP codes are possible?
D D D D D = 10 ×10 ×10 ×10 ×10 = 100, 000
D L L L D D D = 36 × 36 × 36 × 36 × 36 × 36 × 36 = 78, 364,164, 096
6) How many different 6-part password can be written (case sensitive with 10 digits, 52 letters and 8 symbols) 70 × 70 × 70 × 70 × 70 × 70 = 117, 649, 000, 000
5. PA license plates have 3 letters followed by 4 numbers. a. If the same letter or number can be repeated, how many can be made?
D L L L D D D = 10 × 26 × 26 × 26 ×10 ×10 ×10 = 175, 760, 000
5) How many different 7- part license plates are possible if each part can use letter or digit?
相关文档
最新文档