There are 87 boys and girls altogether.
27 of the number of boys is 3 more than the number of girls.
- How many boys are there?
- How many more boys than girls are there?
(a)
Number of boys = 7 u
Number of girls = 2 u - 3
Number of children
= 7 u + 2 u - 3
= 9 u - 3
9 u - 3 = 87
9 u = 87 + 3
9 u = 90
1 u = 90 ÷ 9 = 10
Number of boys
= 7 u
= 7 x 10
= 70
(b)
Number of girls
= 87 - 70
= 17
Number of more boys than girls
= 70 - 17
= 53
Answer(s): (a) 70; (b) 53