There are 80 girls and boys altogether.
37 of the number of girls is 20 more than the number of boys.
- How many girls are there?
- How many more girls than boys are there?
(a)
Number of girls = 7 u
Number of boys = 3 u - 20
Number of children
= 7 u + 3 u - 20
= 10 u - 20
10 u - 20 = 80
10 u = 80 + 20
10 u = 100
1 u = 100 ÷ 10 = 10
Number of girls
= 7 u
= 7 x 10
= 70
(b)
Number of boys
= 80 - 70
= 10
Number of more girls than boys
= 70 - 10
= 60
Answer(s): (a) 70; (b) 60