Question

The ratio of boys to girls is 1:2.

Two boys and two girls enter the
room and the ratio is now 5:9.
How many boys and girls were
there originally?

Answer 1

Answer:let the original number of boys be x

x:2x=1:2

x+2:2x+2=5:9

9x+18=10x+10

x=8

2x=16

Explanation: