Question

A jar contains 24 marbles, some are green and others are blue. If a marble is drawn at random from the jar, the probability that it is green is 2/3. Find the number of blue balls in the jar?

• A. 16
• B. 8
• C. 12
• D. 6

Answer 1

Answer:

B. 8

Let number of green be X Number of blue = 24 - X probability of green is 2/3 X/24 = 2/3 X = 2/3 × 24 = 16 Green = 16 Blue = 24 - 16 = 8