Question

The number of marbles of different colors stored in a hat is listed below:

1 red marble
8 green marbles
9 blue marbles
Without looking in the hat, Ray takes out a marble at random. He replaces the marble and then takes out another marble from the hat. What is the probability that Ray takes out a blue marble in both draws? (5 points)

a
fraction 1 over 9

b
fraction 1 over 8

c
fraction 1 over 4

d
fraction 1 over 2

Answer 1

1/2 probability because one plus eight plus nine equal 18. 9 which is half is blue .

Answer 2

18 marbles total
9 blue marbles

First pick = 9/18 or 1/2
Second pick = 9/18 or 1/2

1/2 * 1/2 = 1/4 C