Question

2) 30 girls and boys have planned for a picnic. There is a ratio of 3 girls to 7 boys. How many boys are there?

Answer 1

HERE IS THE ANSWER

◆ 10 children, 7 are boys.

◆ So, since we have 3 sets of 10 children, these 3 sets must have 3 X 7 = 21 boys.

So the number of boys are 21.

HOPE IT HELPS

Answer 2

let the no. of girls and boys be x then no. if girls = 3 x and no. of boys = 7 x. now 3x +7x = 30. 10 x = 30. hence x = 3. thus the no. of girls is 3 x = 3 *3=9. and no. of boys are 7 x =7*3=21