Question

The number of chips of different colors in Rick's bag is shown below

3 red chips

11 green chips

7 yellow chips

Rick takes out a chip from the bag randomly without looking. He replaces the chip and then takes out another chip from the bag. What is the probability that Rick takes out a yellow chip in both draws?

Answer 1

1/9

because there are 21 chips in the bag 7 of them are yellow so 7/21

but you draw twice so you square it (7/21)^2=1/9