Question

A bag contains 4 red marbles, 3 blue marbles and 2 green marbles. If two marbles are drawn out of the bag, what is the probability, to the nearest 10th of a percent, that both marbles drawn will be red?

Answer 1

16.6

Explanation:

4+3+2=9 marbles

4=red

4/9*3/8=1/6

1/6= 16.6

Answer 2

Probability = 16.7

Explanation:

Total marbles 9

Choosing 2 red =
`4C_2`

Choosing 2 marbles from 9 marbles =
`9C_2`

Probability percent of choosing 2 red marbles from 9 marbles

`(4C_2)/(9C_2) = (1)/(6) * 100 = 0.1667 * 100 = 16.7`