The ratio of boys to girls in a group is 7:1. If there are 54 more boys than girls, work out how many boys there are.

63 boys

Step-by-step explanation:

Given that the ratio of boys : girls = 7 : 1 = 7x : x (x is a multiplier), then

7x = x + 54 (54 more boys than girls)

Subtract x from both sides

6x = 54 (divide both sides by 6)

x = 9, hence

number of boys = 7x = 7 * 9 = 63