There are 730 people,
of which 30 are men.
There are 100 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 = 30
Number of children = 1 u
Number of women = 1 u + 100
Total number of people
= 30 + 1 u + 1 u + 100
= 1 u + 1 u + 30 + 100
= 2 u + 130
2 u + 130 = 730
2 u = 730 - 130
2 u = 600
1 u = 600 ÷ 2 = 300
Number of children
= 1 u
= 300
(b)
Number of adults
= 30 + 1 u + 100
= 30 + 300 + 100
= 430
(c)
Number of less children than adults
= 430 - 300
= 130
(d)
Number of more women than men
= 1 u + 100 - 30
= 300 + 100 - 30
= 370
Answer(s): (a) 300; (b) 430; (c) 130; (d) 370