25 of the people are adults.
67 of the remainder are girls.
There are 20 more girls than adults.
How many people are there?
Adults |
Children |
2 x 7 |
3 x 7 |
|
Girls |
Boys |
|
6 x 3 |
1 x 3 |
14 u |
18 u |
3 u |
The number of children is the combined repeated identity.
Make the number of children the same by using LCM of 3 and 7.
LCM of 3 and 7 = 21
Number of girls = 18 u
Number of adults = 14 u
Number of more girls than adults
= 18 u - 14 u
= 4 u
4 u = 20
1 u = 20 ÷ 4 = 5
Total number of people
= 14 u + 18 u + 3 u
= 35 u
= 35 x 5
= 175
Answer(s): 175