There are 45 boys and girls altogether.
23 of the number of boys is 15 more than the number of girls.
- How many boys are there?
- How many more boys than girls are there?
(a)
Number of boys = 3 u
Number of girls = 2 u - 15
Number of children
= 3 u + 2 u - 15
= 5 u - 15
5 u - 15 = 45
5 u = 45 + 15
5 u = 60
1 u = 60 ÷ 5 = 12
Number of boys
= 3 u
= 3 x 12
= 36
(b)
Number of girls
= 45 - 36
= 9
Number of more boys than girls
= 36 - 9
= 27
Answer(s): (a) 36; (b) 27