18 of the people in a museum are boys.
27 of the remainder are girls and the rest are adults. There are 630 more adults than girls. How many people are there in the museum altogether?
| Boys |
Girls |
Adults |
Total |
| 1 |
7 |
8 |
| |
2 |
5 |
|
| 1 u |
2 u |
5 u |
8 |
Fraction of the people that are girls and adults
= 1 -
18 =
78 Fraction of the remaining people that are adults
= 1 -
27 =
57 Total number of people = 8 u
Number of boys = 1 u
Number of girls = 2 u
Number of adults = 5 u
Number of more adults than girls
= 5 u - 2 u
= 3 u
3 u = 630
1 u = 630 ÷ 3 = 210
Total number of people
= 8 u
= 8 x 210
= 1680
Answer(s): 1680
