There are 680 people,
of which 120 are men.
There are 330 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 = 120
Number of children = 1 u
Number of women = 1 u + 330
Total number of people
= 120 + 1 u + 1 u + 330
= 1 u + 1 u + 120 + 330
= 2 u + 450
2 u + 450 = 680
2 u = 680 - 450
2 u = 230
1 u = 230 ÷ 2 = 115
Number of children
= 1 u
= 115
(b)
Number of adults
= 120 + 1 u + 330
= 120 + 115 + 330
= 565
(c)
Number of less children than adults
= 565 - 115
= 450
(d)
Number of more women than men
= 1 u + 330 - 120
= 115 + 330 - 120
= 325
Answer(s): (a) 115; (b) 565; (c) 450; (d) 325