Test
Statistics
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Preguntas del test (10)
1A physics exam consists of 9 multiple choice questions and 6 open-ended problems in which all work must be shown. If an examinee must answer 7 of the multiple choice question and 3 of the open ended problems, in how many ways can the questions and problems be chosen?
- A720
- B1134
- C21,772, 800
- D261,273,600
2It is known that cars arrive at a drive-thru at a rate of three cars per minute between 12 noon and 1:00 pm. Assuming the number of cars that arrive in any time interval has a Poisson distribution, what is the probability that exactly 9 cars arrive 12:10 and 12:15?
- Ae^(-9) 3^9)/3!
- Be^(-15) 〖15〗^9)/9!
- Ce^(-3) 〖15〗^3)/15!
- Dnone of the above
3 A professor wants to arrange his books on a shelf. He has 30 books and only space on the shelf for 20 of them. How many different 20-book arrangements can be make using 30 books? This is an example of a problem that can be solved using which method?
- AConditional Probability
- BRandomness
- CCombinations
- DPermutations
4 On a particular night, 50% of a group of people polled says that they are going to watch the hockey game and 26% says they are going to watch both the hockey game and the news. If 87% say they are going to watch at least one program, what percentage of these people say they are going to watch the news?
- A13%
- B37%
- C60%
- D63%
5In a playoff series, the probability that Team A wins over Team B is 3/5, and the probability that Team C wins over Team D is 4/7. If the probabilities are independent, the probability that Team A wins and Team C loses is
- A9/35
- B12/35
- C7/12
- D1/3
6The number of customers entering a bank per minute is a Poisson random variable with a mean of 3.5 customers per minute. What is the probability that more than three customers enter the bank in a minute?
- A0.3209
- B0.4633
- C0.5367
- D0.6791
7The probability that a certain machine will produce a defective item is 0.20. If a random sample of 6 items is taken, what is the probability that there will be 5 or more defectives in the sample?
- A0.0001
- B0.0016
- C0.0154
- D0.2458
8According to a survey, 75% of all customers will return to the same grocery store. Suppose eight customers are selected at random, what is the probability that exactly five of the customers will return?
- A0.0467
- B0.1468
- C0.2076
- D0.2541
9A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn are blue?
- A10/21
- B11/27
- C2/7
- D5/7
10Two cards are drawn without replacement from a deck of 52 cards. the probability of the first card being red face and the second card being a club is
- A1/34
- B3/104
- C19/52
- D9/22
Información
- Descripción
- Removal exam
- Autor
- Justine Sabanal
- Idioma
- English
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