There are 770 people,
of which 140 are men.
There are 340 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 = 140
Number of children = 1 u
Number of women = 1 u + 340
Total number of people
= 140 + 1 u + 1 u + 340
= 1 u + 1 u + 140 + 340
= 2 u + 480
2 u + 480 = 770
2 u = 770 - 480
2 u = 290
1 u = 290 ÷ 2 = 145
Number of children
= 1 u
= 145
(b)
Number of adults
= 140 + 1 u + 340
= 140 + 145 + 340
= 625
(c)
Number of less children than adults
= 625 - 145
= 480
(d)
Number of more women than men
= 1 u + 340 - 140
= 145 + 340 - 140
= 345
Answer(s): (a) 145; (b) 625; (c) 480; (d) 345