There are 750 people,
of which 50 are boys.
There are 480 less adults than girls.
- How many adults are there?
- How many children are there?
- How many less adults than children are there?
- How many more girls than boys are there?
(a)
Number of boys = 50
Number of adults = 1 u
Number of girls = 1 u + 480
Total number of people
= 50 + 1 u + 1 u + 480
= 1 u + 1 u + 50 + 480
= 2 u + 530
2 u + 530 = 750
2 u = 750 - 530
2 u = 220
1 u = 220 ÷ 2 = 110
Number of adults
= 1 u
= 110
(b)
Number of children
= 50 + 1 u + 480
= 50 + 110 + 480
= 640
(c)
Number of less adults than children
= 640 - 110
= 530
(d)
Number of more girls than boys
= 1 u + 480 - 50
= 110 + 480 - 50
= 540
Answer(s): (a) 110; (b) 640; (c) 530; (d) 540