112 of the people in a museum are boys.
211 of the remainder are girls and the rest are adults. There are 910 more adults than girls. How many people are there in the museum altogether?
| Boys |
Girls |
Adults |
Total |
| 1 |
11 |
12 |
| |
2 |
9 |
|
| 1 u |
2 u |
9 u |
12 |
Fraction of the people that are girls and adults
= 1 -
112 =
1112 Fraction of the remaining people that are adults
= 1 -
211 =
911 Total number of people = 12 u
Number of boys = 1 u
Number of girls = 2 u
Number of adults = 9 u
Number of more adults than girls
= 9 u - 2 u
= 7 u
7 u = 910
1 u = 910 ÷ 7 = 130
Total number of people
= 12 u
= 12 x 130
= 1560
Answer(s): 1560
