Question

There are 5 red marbles, 15 blue marbles, and 5 green marbles in a bag. If you reach in and randomly draw two marbles without replacing the first, what is the probability that both will be blue?

19/49

3/5

7/20

8/15

Answer 1

Answer:

3/5

Step-by-step explanation:

Total number of marbles =5+15+5 =25

Number of blue marbles =15

Probability of blue marbles = 15/25

=3/5

Hope it helps you..

Answer 2

Step-by-step explanation:

On the first draw there are 25 marbles, of which 15 are blue—so the probability of drawing a blue marble on the first draw is 15/25, or 3/5.

On the second draw (assuming you drew a blue marble on the first draw) there are 24 marbles, of which 14 are blue—so the probability of drawing a blue marble on the second draw is 14/24, or 7/12.

3/5*7/12 = 21/60 chance that both marbles will be blue, or 35%.