There are 840 people,
of which 130 are women.
There are 380 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 = 130
Number of children = 1 u
Number of men = 1 u + 380
Total number of people
= 130 + 1 u + 1 u + 380
= 1 u + 1 u + 130 + 380
= 2 u + 510
2 u + 510 = 840
2 u = 840 - 510
2 u = 330
1 u = 330 ÷ 2 = 165
Number of children
= 1 u
= 165
(b)
Number of adults
= 130 + 1 u + 380
= 130 + 165 + 380
= 675
(c)
Number of less children than adults
= 675 - 165
= 510
(d)
Number of more men than women
= 1 u + 380 - 130
= 165 + 380 - 130
= 415
Answer(s): (a) 165; (b) 675; (c) 510; (d) 415