math
posted by jane on .
There were 20% more boys than girls in a swimming club. After 50 girls left, there were twice as many boys as girls in the club. How many boys were there in the club?

b = 1.2g
b = 2(g50)
so,
1.2g = 2g100
.8g = 100
g = 125
so, b = 150