19 of the people in a park are girls.
18 of the remainder are boys and the rest are adults. There are 780 more adults than boys. How many people are there in the 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 = 780
1 u = 780 ÷ 6 = 130
Total number of people
= 9 u
= 9 x 130
= 1170
Answer(s): 1170
