There were some adults and children at a function.
37 of the people were adults.
35 of the children were boys and the rest were girls. There were 40 girls.
- How many children were there?
- How many more children than adults were at the function?
Adults |
Children |
Total |
3x5 |
4x5 |
7x5 |
|
Boys |
Girls |
|
|
3x4 |
2x4 |
|
15 u |
12 u |
8 u |
35 u |
(a)
The number of children is the combined repeated identity.
Number of girls = 8 u
8 u = 40
1 u = 40 ÷ 8 = 5
Number of children
= 20 u
= 20 x 5
= 100
(b)
Number of more children than adults
= 20 u - 15 u
= 5 u
= 5 x 5
= 25
Answer(s): (a) 100; (b) 25