There are 710 people,
of which 30 are women.
There are 550 less adults than men.
- How many children are there?
- How many adults are there?
- How many less children than adults are there?
- How many more men than women are there?
(a)
Number of women = 30
Number of children = 1 u
Number of men = 1 u + 550
Total number of people
= 30 + 1 u + 1 u + 550
= 1 u + 1 u + 30 + 550
= 2 u + 580
2 u + 580 = 710
2 u = 710 - 580
2 u = 130
1 u = 130 ÷ 2 = 65
Number of children
= 1 u
= 65
(b)
Number of adults
= 30 + 1 u + 550
= 30 + 65 + 550
= 645
(c)
Number of less children than adults
= 645 - 65
= 580
(d)
Number of more men than women
= 1 u + 550 - 30
= 65 + 550 - 30
= 585
Answer(s): (a) 65; (b) 645; (c) 580; (d) 585