Question

Kari has a box with brand new pencils that are all the same size. She has 1 yellow pencil, 5 blue pencils, and 5 red pencils. She will pick two pencils without looking and without replacement.

Write an expression that can be used to determine the probability that Kari will first pick a blue pencil and then a yellow pencil.

Answer 1

(5/11)(1/10)

Explanation:

probability of picking blue = 5/11

Now there are only 10 pencils

probability of picking yellow = 1/10

probability of picking blue, then yellow = (5/11)(1/10) = 1/22