27 of the people in a stadium are girls.
15 of the remainder are boys and the rest are adults. There are 780 more adults than boys. How many people are there in the stadium altogether?
| Girls |
Boys |
Adults |
Total |
| 2 |
5 |
7 |
| |
1 |
4 |
|
| 2 u |
1 u |
4 u |
7 |
Fraction of the people that are boys and adults
= 1 -
27 =
57 Fraction of the remaining people that are adults
= 1 -
15 =
45 Total number of people = 7 u
Number of girls = 2 u
Number of boys = 1 u
Number of adults = 4 u
Number of more adults than boys
= 4 u - 1 u
= 3 u
3 u = 780
1 u = 780 ÷ 3 = 260
Total number of people
= 7 u
= 7 x 260
= 1820
Answer(s): 1820
