There are 740 people,
of which 120 are men.
There are 560 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 + 560
Total number of people
= 120 + 1 u + 1 u + 560
= 1 u + 1 u + 120 + 560
= 2 u + 680
2 u + 680 = 740
2 u = 740 - 680
2 u = 60
1 u = 60 ÷ 2 = 30
Number of children
= 1 u
= 30
(b)
Number of adults
= 120 + 1 u + 560
= 120 + 30 + 560
= 710
(c)
Number of less children than adults
= 710 - 30
= 680
(d)
Number of more women than men
= 1 u + 560 - 120
= 30 + 560 - 120
= 470
Answer(s): (a) 30; (b) 710; (c) 680; (d) 470