A college library has five copies of a certain text on reserve Two copies (1 and

Question

A college library has five copies of a certain text on reserve Two copies (1 and 2) are first printings, and the other three (3, 4, and 5) are second printings A Student examines these books in random order, stopping only when a second printing has been selected. One possible outcome is 5, and another Is 213. (Enter your answers in set notation. Enter EMPTY or 0 for the empty set) List the outcomes in S. {(3).(4)(5), (13).(14).(l5).(23).(21).(25).(123).(124).(1 Let A denote the event that exactly one book must be examined. What outcomes are in A? Let B be the event that book 5 is the one selected What outcomes are in B? {(5), (15), .(2 5), (1 2 5), (2 1 3)} Let C be the event that book 1 is not examined. What outcomes are in C? {(3), (4), (3), (23)(24), (125)}

Explanation / Answer

Here are the answers to the questions:

I don't see why the evaluator has market wrong for some parts, but the below solution is right:

a.3,4,5,13,14,15,23,24,25,123,213,124,214,125,215

b.3,4,5

c.15,25,125,215,5

d.23,24,25,3,4,5

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