There are 650 people,
of which 200 are boys.
There are 370 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 = 200
Number of adults = 1 u
Number of girls = 1 u + 370
Total number of people
= 200 + 1 u + 1 u + 370
= 1 u + 1 u + 200 + 370
= 2 u + 570
2 u + 570 = 650
2 u = 650 - 570
2 u = 80
1 u = 80 ÷ 2 = 40
Number of adults
= 1 u
= 40
(b)
Number of children
= 200 + 1 u + 370
= 200 + 40 + 370
= 610
(c)
Number of less adults than children
= 610 - 40
= 570
(d)
Number of more girls than boys
= 1 u + 370 - 200
= 40 + 370 - 200
= 210
Answer(s): (a) 40; (b) 610; (c) 570; (d) 210