There are 900 people,
of which 210 are men.
There are 230 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 = 210
Number of children = 1 u
Number of women = 1 u + 230
Total number of people
= 210 + 1 u + 1 u + 230
= 1 u + 1 u + 210 + 230
= 2 u + 440
2 u + 440 = 900
2 u = 900 - 440
2 u = 460
1 u = 460 ÷ 2 = 230
Number of children
= 1 u
= 230
(b)
Number of adults
= 210 + 1 u + 230
= 210 + 230 + 230
= 670
(c)
Number of less children than adults
= 670 - 230
= 440
(d)
Number of more women than men
= 1 u + 230 - 210
= 230 + 230 - 210
= 250
Answer(s): (a) 230; (b) 670; (c) 440; (d) 250