There are 137 girls and boys altogether.
37 of the number of girls is 13 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 - 13
Number of children
= 7 u + 3 u - 13
= 10 u - 13
10 u - 13 = 137
10 u = 137 + 13
10 u = 150
1 u = 150 ÷ 10 = 15
Number of girls
= 7 u
= 7 x 15
= 105
(b)
Number of boys
= 137 - 105
= 32
Number of more girls than boys
= 105 - 32
= 73
Answer(s): (a) 105; (b) 73