Question

A pencil box contains different colored pens as listed below:

•5 green pens
• 3 blue pens
• 2 red pens
A pen will be randomly selected from the drawer. Then another pen will be randomly selected
from the drawer. What is the probability that a blue pen will be selected both times

Answer 1

1/15

Explanation:

Probability of 1st selection being blue = 3/10

Probability of 2nd selection being blue (if the 1st blue is not replaced) = 2/9

multiply: 3/10 x 2/9 = 1/15