Question

A bag contains 28 marbles. The theoretical probability of randomly drawing a

blue marble is 3/7. Find the number of blue marbles in the bag.

Answer 1

12

Explanation:

Probability = Expected outcome/Total outcome

GIven

Total outcome = 28marbles

probability of randomly drawing a blue marble = 3/7

Substitute

3/7 = number of blue marbles/28

Cross multiply

7N = 3* 28

N = 3*4

N= 12

Hence there 12 blue marbles in the bag