There are 740 people,
of which 120 are girls.
There are 160 less adults than boys.
- How many adults are there?
- How many children are there?
- How many less adults than children are there?
- How many more boys than girls are there?
(a)
Number of girls = 120
Number of adults = 1 u
Number of boys = 1 u + 160
Total number of people
= 120 + 1 u + 1 u + 160
= 1 u + 1 u + 120 + 160
= 2 u + 280
2 u + 280 = 740
2 u = 740 - 280
2 u = 460
1 u = 460 ÷ 2 = 230
Number of adults
= 1 u
= 230
(b)
Number of children
= 120 + 1 u + 160
= 120 + 230 + 160
= 510
(c)
Number of less adults than children
= 510 - 230
= 280
(d)
Number of more boys than girls
= 1 u + 160 - 120
= 230 + 160 - 120
= 270
Answer(s): (a) 230; (b) 510; (c) 280; (d) 270