There are 168 girls and boys altogether.
27 of the number of girls is 12 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 = 2 u - 12
Number of children
= 7 u + 2 u - 12
= 9 u - 12
9 u - 12 = 168
9 u = 168 + 12
9 u = 180
1 u = 180 ÷ 9 = 20
Number of girls
= 7 u
= 7 x 20
= 140
(b)
Number of boys
= 168 - 140
= 28
Number of more girls than boys
= 140 - 28
= 112
Answer(s): (a) 140; (b) 112