Question

There are 150 green marbles and 100 yellow marbles in a bag that contains 250 marbles. If only yellow marbles are added to the bag so that the probability of randomly drawing a yellow marble from the bag becomes 3/5, how many yellow marbles are in the bag?

Answer 1

g = 150
y = 100 + x

total = 100 + x + 150 = 250+x
(100 + x) /(250+x) = 3/5

5(100+x) = 3(250+x)

Answer 2

x = 125

Answer 3

yes