13 of the people are adults.
67 of the remainder are girls.
There are 15 more girls than adults.
How many people are there?
Adults |
Children |
1 x 7 |
2 x 7 |
|
Girls |
Boys |
|
6 x 2 |
1 x 2 |
7 u |
12 u |
2 u |
The number of children is the combined repeated identity.
Make the number of children the same by using LCM of 2 and 7.
LCM of 2 and 7 = 14
Number of girls = 12 u
Number of adults = 7 u
Number of more girls than adults
= 12 u - 7 u
= 5 u
5 u = 15
1 u = 15 ÷ 5 = 3
Total number of people
= 7 u + 12 u + 2 u
= 21 u
= 21 x 3
= 63
Answer(s): 63