There are 135 boys and girls altogether.
27 of the number of boys is 9 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 - 9
Number of children
= 7 u + 2 u - 9
= 9 u - 9
9 u - 9 = 135
9 u = 135 + 9
9 u = 144
1 u = 144 ÷ 9 = 16
Number of boys
= 7 u
= 7 x 16
= 112
(b)
Number of girls
= 135 - 112
= 23
Number of more boys than girls
= 112 - 23
= 89
Answer(s): (a) 112; (b) 89