19 of the people in a theme park are girls.
18 of the remainder are boys and the rest are adults. There are 660 more adults than boys. How many people are there in the theme park altogether?
| Girls |
Boys |
Adults |
Total |
| 1 |
8 |
9 |
| |
1 |
7 |
|
| 1 u |
1 u |
7 u |
9 |
Fraction of the people that are boys and adults
= 1 -
19 =
89 Fraction of the remaining people that are adults
= 1 -
18 =
78 Total number of people = 9 u
Number of girls = 1 u
Number of boys = 1 u
Number of adults = 7 u
Number of more adults than boys
= 7 u - 1 u
= 6 u
6 u = 660
1 u = 660 ÷ 6 = 110
Total number of people
= 9 u
= 9 x 110
= 990
Answer(s): 990
