There are 90 people,
of which 10 are men.
There are 50 less children 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 = 10
Number of children = 1 u
Number of women = 1 u + 50
Total number of people
= 10 + 1 u + 1 u + 50
= 1 u + 1 u + 10 + 50
= 2 u + 60
2 u + 60 = 90
2 u = 90 - 60
2 u = 30
1 u = 30 ÷ 2 = 15
Number of children
= 1 u
= 15
(b)
Number of adults
= 10 + 1 u + 50
= 10 + 15 + 50
= 75
(c)
Number of less children than adults
= 75 - 15
= 60
(d)
Number of more women than men
= 1 u + 50 - 10
= 15 + 50 - 10
= 55
Answer(s): (a) 15; (b) 75; (c) 60; (d) 55