12
practice testMultiple Choice

Practice Test

Question 12 • Mathematics II

Nico owns 11 instructional piano books. Two are beginner books, six are intermediate books, and three are advanced books. If two books are randomly chosen from the collection, one at a time, and replaced after each pick, what is the probability that he first chooses an advanced book and then chooses a beginner book?

Answer
A
6 over 11
B
5 over 11
C
5 over 121
D
6 over 121

Explanation

The probability of choosing an advanced book first is 3/11, and because the book is replaced, the probability of choosing a beginner book next is still 2/11. Multiply the probabilities: (3/11)(2/11) = 6/121, so the correct choice is 6 over 121.

AI-written and checked against the verified answer.

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