27 of the people in a park are boys.
15 of the remainder are girls and the rest are adults. There are 720 more adults than girls. How many people are there in the park altogether?
| Boys |
Girls |
Adults |
Total |
| 2 |
5 |
7 |
| |
1 |
4 |
|
| 2 u |
1 u |
4 u |
7 |
Fraction of the people that are girls and adults
= 1 -
27 =
57 Fraction of the remaining people that are adults
= 1 -
15 =
45 Total number of people = 7 u
Number of boys = 2 u
Number of girls = 1 u
Number of adults = 4 u
Number of more adults than girls
= 4 u - 1 u
= 3 u
3 u = 720
1 u = 720 ÷ 3 = 240
Total number of people
= 7 u
= 7 x 240
= 1680
Answer(s): 1680
