Sample Questions -- Probability

1. A class in statistics consists of 6 men and 4 women. An exam is given and all the students are ranked according to their performance. (No two students obtained the same score on the exam).

A. How many different rankings are possible?

B. If all the rankings are considered equally likely, then what is the probability that women receive the top 4 scores?

C. If all the rankings are considered equally likely, then what is the probability that women receive the top 3 scores?

2. A committee of 5 is to be selected from a group of 6 men and 9 women.

A. If the selection is made at random, what is the probability that all men are selected?

B. If the selection is made at random, what is the probability that the committee consists of 3 men and 2 women?

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