25 of the people are adults.
89 of the remainder are girls.
There are 12 more girls than adults.
How many people are there?
Adults |
Children |
2 x 3 |
3 x 3 |
|
Girls |
Boys |
|
8 |
1 |
6 u |
8 u |
1 u |
The number of children is the combined repeated identity.
Make the number of children the same by using LCM of 3 and 9.
LCM of 3 and 9 = 9
Number of girls = 8 u
Number of adults = 6 u
Number of more girls than adults
= 8 u - 6 u
= 2 u
2 u = 12
1 u = 12 ÷ 2 = 6
Total number of people
= 6 u + 8 u + 1 u
= 15 u
= 15 x 6
= 90
Answer(s): 90