Question

The ratio of boys to girls in a group is 7:1. If there are 66 more boys than girls, work out how many girls there are.

Answer 1

Answer:

11

Step-by-step explanation:

ratio of boys to girls in a group is 7:1

If girls= x, then boys= 7x

Boys are more than girls: 7x-x= 66

6x=66

x=11

So 11 girls

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Answer 2

Ratio =7:1

Let the common factor be x which means 7x and x.

There are 66 more boys than girls .

That means

x+66=7x

=>66=7x-x

=>6x=66

=>x=66/6

=>x=11

Therefore, no. of girls are 11