There are 100 girls and boys altogether.
35 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 = 5 u
Number of boys = 3 u - 20
Number of children
= 5 u + 3 u - 20
= 8 u - 20
8 u - 20 = 100
8 u = 100 + 20
8 u = 120
1 u = 120 ÷ 8 = 15
Number of girls
= 5 u
= 5 x 15
= 75
(b)
Number of boys
= 100 - 75
= 25
Number of more girls than boys
= 75 - 25
= 50
Answer(s): (a) 75; (b) 50