There are 860 people,
of which 30 are women.
There are 250 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 + 250
Total number of people
= 30 + 1 u + 1 u + 250
= 1 u + 1 u + 30 + 250
= 2 u + 280
2 u + 280 = 860
2 u = 860 - 280
2 u = 580
1 u = 580 ÷ 2 = 290
Number of children
= 1 u
= 290
(b)
Number of adults
= 30 + 1 u + 250
= 30 + 290 + 250
= 570
(c)
Number of less children than adults
= 570 - 290
= 280
(d)
Number of more men than women
= 1 u + 250 - 30
= 290 + 250 - 30
= 510
Answer(s): (a) 290; (b) 570; (c) 280; (d) 510