There are 490 people,
of which 190 are men.
There are 220 less adults than women.
- How many children are there?
- How many adults are there?
- How many less children than adults are there?
- How many more women than men are there?
(a)
Number of men = 190
Number of children = 1 u
Number of women = 1 u + 220
Total number of people
= 190 + 1 u + 1 u + 220
= 1 u + 1 u + 190 + 220
= 2 u + 410
2 u + 410 = 490
2 u = 490 - 410
2 u = 80
1 u = 80 ÷ 2 = 40
Number of children
= 1 u
= 40
(b)
Number of adults
= 190 + 1 u + 220
= 190 + 40 + 220
= 450
(c)
Number of less children than adults
= 450 - 40
= 410
(d)
Number of more women than men
= 1 u + 220 - 190
= 40 + 220 - 190
= 70
Answer(s): (a) 40; (b) 450; (c) 410; (d) 70