There are 510 people,
of which 160 are boys.
There are 200 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 = 160
Number of adults = 1 u
Number of girls = 1 u + 200
Total number of people
= 160 + 1 u + 1 u + 200
= 1 u + 1 u + 160 + 200
= 2 u + 360
2 u + 360 = 510
2 u = 510 - 360
2 u = 150
1 u = 150 ÷ 2 = 75
Number of adults
= 1 u
= 75
(b)
Number of children
= 160 + 1 u + 200
= 160 + 75 + 200
= 435
(c)
Number of less adults than children
= 435 - 75
= 360
(d)
Number of more girls than boys
= 1 u + 200 - 160
= 75 + 200 - 160
= 115
Answer(s): (a) 75; (b) 435; (c) 360; (d) 115