Question

Nadia’s bookshelf contains 10 fiction books, two reference books, and five nonfiction books.

What is the probability that she randomly picks up a reference book and then, without replacing it, picks up a nonfiction book?
a.1/289
b.10/289
c.5/136
d.1/10

Answer 1

First, how many books are there total?

Answer 2

17

Answer 3

Ok, so there are 2 reference books, so you have a 2/17 chance of picking one of them.

Answer 4

Once we take away the reference book, there are only 16 books left. What would the chance of picking a nonfiction book be?

Answer 5

5/16

Answer 6

Perfect, so, just multiply 2/17 and 5/16. That will give you the answer!

Answer 7

10/272

Answer 8

5/136 which is C

Answer 9

Yep!!