There are 620 people,
of which 60 are girls.
There are 310 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 = 60
Number of adults = 1 u
Number of boys = 1 u + 310
Total number of people
= 60 + 1 u + 1 u + 310
= 1 u + 1 u + 60 + 310
= 2 u + 370
2 u + 370 = 620
2 u = 620 - 370
2 u = 250
1 u = 250 ÷ 2 = 125
Number of adults
= 1 u
= 125
(b)
Number of children
= 60 + 1 u + 310
= 60 + 125 + 310
= 495
(c)
Number of less adults than children
= 495 - 125
= 370
(d)
Number of more boys than girls
= 1 u + 310 - 60
= 125 + 310 - 60
= 375
Answer(s): (a) 125; (b) 495; (c) 370; (d) 375