Correct Answer: C
Explanation:
Statement (1) doesn’t tell us anything about the breakdown of the different types of books,
so we don’t know how likely Jana is to draw a non-fiction book. Eliminate A and D.
Statement (2) alone doesn’t tell us anything about the number of non-fiction books. So we can
eliminate B.
Putting the statements together, we can tell that there are 6 non-fiction books on the shelf by
subtracting 4 and 5 from 15. Therefore, Jana has a 6/15 or 2/5 probability of drawing a non-fiction
book at random, and our answer is C.