There are 105 girls and boys altogether.
37 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 = 7 u
Number of boys = 3 u - 15
Number of children
= 7 u + 3 u - 15
= 10 u - 15
10 u - 15 = 105
10 u = 105 + 15
10 u = 120
1 u = 120 ÷ 10 = 12
Number of girls
= 7 u
= 7 x 12
= 84
(b)
Number of boys
= 105 - 84
= 21
Number of more girls than boys
= 84 - 21
= 63
Answer(s): (a) 84; (b) 63