There are 890 people,
of which 20 are women.
There are 700 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 = 20
Number of children = 1 u
Number of men = 1 u + 700
Total number of people
= 20 + 1 u + 1 u + 700
= 1 u + 1 u + 20 + 700
= 2 u + 720
2 u + 720 = 890
2 u = 890 - 720
2 u = 170
1 u = 170 ÷ 2 = 85
Number of children
= 1 u
= 85
(b)
Number of adults
= 20 + 1 u + 700
= 20 + 85 + 700
= 805
(c)
Number of less children than adults
= 805 - 85
= 720
(d)
Number of more men than women
= 1 u + 700 - 20
= 85 + 700 - 20
= 765
Answer(s): (a) 85; (b) 805; (c) 720; (d) 765