Question

A bag contains 6 red marbles, 4 black marbles, 10 green marbles, and 2 blue marbles. Marbles are taken at random from the bag, one at a time, and then replaced. Find the probability of drawing a black marble, then drawing a green marble.

A 2/11
B 7/11
c 10/121
d 20/231​

Answer 1

B

Explanation:

First you will add them all up

6+4+10+2=22

Second find the black and green amount and add them together

4+10=14

Thirdly turn this into a fraction

14/22

Lastly simplify

14/11 / 2 = 7/11