There are 55 girls and boys altogether.
23 of the number of girls is 15 more than the number of boys.
- How many girls are there?
- How many more girls than boys are there?
(a)
Number of girls = 3 u
Number of boys = 2 u - 15
Number of children
= 3 u + 2 u - 15
= 5 u - 15
5 u - 15 = 55
5 u = 55 + 15
5 u = 70
1 u = 70 ÷ 5 = 14
Number of girls
= 3 u
= 3 x 14
= 42
(b)
Number of boys
= 55 - 42
= 13
Number of more girls than boys
= 42 - 13
= 29
Answer(s): (a) 42; (b) 29