Description
Brent started to solve the following probability problem as shown below:
A shipment at a department store contains 40 alarm clocks. 4 of them are defective. If 6 alarm clocks are removed from the shipment at random, find the probability that four of them are defective.
Brent’s work: C(4, 4) = |
What is the correct next step to solve the problem?
A. |
B. |
C. |
D. |
Stacy started to solve the following probability problem as shown below:
Two cards are drawn from a fair deck of cards without replacement. Find the probability that both cards are Spades.
What is the correct next step to solve the problem?
A. s + f = 78 + 1325 = 1404 |
B. |
C. |
D. C(13, 2) • C(52, 2) =78 • 1326 = 103,428 |
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Suppose the probability of success of an event is s and the probability of failure is t. What is s + t?
P(s) • P(t)
0
1
cannot be determined
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Stephanie is solves the probability problem below incorrectly. In which line does she first make an error? Find and correct the error in this line.
Brittany plans to take Pre-Calculus, English 12, Physics, Physical Education, Economics, and Anthropology in her senior year. She hopes to have Pre-Calculus and Physics in the morning. What is the probability that her first two classes will be Pre-Calculus or Physics.
A. |
B. |
C. Line 4; correction: P(6, 6) = 6! • 6! =518,400 |
D. |
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A committee of four people is to be formed from 6 lawyers and 8 teachers. Find the probability that all of them are teachers. Round to the nearest tenth of a percent.
36.0%
89.0%
1.1%
7.0%
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A committee of four people is to be formed from 6 lawyers and 8 teachers. Find the probability that two are teachers and two are lawyers. Round to the nearest tenth of a percent.
42.0%
4.3%
7.0%
75.0%
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There are five seniors and four juniors are nominated for President, Vice President, and Treasurer of student government. A president will be chosen first. A vice president will then be chosen from the remaining nominees. A Treasurer is chosen last. Assuming that everyone has an equal chance of winning, what is the probability that a senior will win President and Vice President and a Junior will win Treasurer? Round to the nearest tenth of a percent.
47.6%
15.9%
11.9%
65.0%
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Gina started to solve the following probability problem as shown below:
Three men and four women line up at a checkout counter at a store. Find the probability that the first two people in line are men and the last two people in line are women.
Gina's work:
|
What is the correct next step to solve the problem?
6 • 3 = 18
6/3 = 2
6 + 3 = 9
6 - 3 = 3
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Which probability histogram can be used to represent the data below?
A. | B. |
C. | D. |
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Use the probability histogram below. According to the distribution, what is P(Age = 23)
23%
0.25%
25%
Not enough information to tell
