There are 920 people,
of which 210 are girls.
There are 240 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 = 210
Number of adults = 1 u
Number of boys = 1 u + 240
Total number of people
= 210 + 1 u + 1 u + 240
= 1 u + 1 u + 210 + 240
= 2 u + 450
2 u + 450 = 920
2 u = 920 - 450
2 u = 470
1 u = 470 ÷ 2 = 235
Number of adults
= 1 u
= 235
(b)
Number of children
= 210 + 1 u + 240
= 210 + 235 + 240
= 685
(c)
Number of less adults than children
= 685 - 235
= 450
(d)
Number of more boys than girls
= 1 u + 240 - 210
= 235 + 240 - 210
= 265
Answer(s): (a) 235; (b) 685; (c) 450; (d) 265