There are 72 boys and girls altogether.
23 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 = 3 u
Number of girls = 2 u - 3
Number of children
= 3 u + 2 u - 3
= 5 u - 3
5 u - 3 = 72
5 u = 72 + 3
5 u = 75
1 u = 75 ÷ 5 = 15
Number of boys
= 3 u
= 3 x 15
= 45
(b)
Number of girls
= 72 - 45
= 27
Number of more boys than girls
= 45 - 27
= 18
Answer(s): (a) 45; (b) 18