15 of the people are adults.
78 of the remainder are girls.
There are 25 more girls than adults.
How many people are there?
Adults |
Children |
1 x 2 |
4 x 2 |
|
Girls |
Boys |
|
7 |
1 |
2 u |
7 u |
1 u |
The number of children is the combined repeated identity.
Make the number of children the same by using LCM of 4 and 8.
LCM of 4 and 8 = 8
Number of girls = 7 u
Number of adults = 2 u
Number of more girls than adults
= 7 u - 2 u
= 5 u
5 u = 25
1 u = 25 ÷ 5 = 5
Total number of people
= 2 u + 7 u + 1 u
= 10 u
= 10 x 5
= 50
Answer(s): 50