112 of the people in a stadium are girls.
211 of the remainder are boys and the rest are adults. There are 1120 more adults than boys. How many people are there in the stadium altogether?
Girls |
Boys |
Adults |
Total |
1 |
11 |
12 |
|
2 |
9 |
|
1 u |
2 u |
9 u |
12 |
Fraction of the people that are boys and adults
= 1 -
112 =
1112 Fraction of the remaining people that are adults
= 1 -
211 =
911 Total number of people = 12 u
Number of girls = 1 u
Number of boys = 2 u
Number of adults = 9 u
Number of more adults than boys
= 9 u - 2 u
= 7 u
7 u = 1120
1 u = 1120 ÷ 7 = 160
Total number of people
= 12 u
= 12 x 160
= 1920
Answer(s): 1920