There were some adults and children at a gathering.
49 of the people were adults.
23 of the children were boys and the rest were girls. There were 15 girls.
- How many children were there?
- How many more children than adults were at the gathering?
Adults |
Children |
Total |
4x3 |
5x3 |
9x3 |
|
Boys |
Girls |
|
|
2x5 |
1x5 |
|
12 u |
10 u |
5 u |
27 u |
(a)
The number of children is the combined repeated identity.
Number of girls = 5 u
5 u = 15
1 u = 15 ÷ 5 = 3
Number of children
= 15 u
= 15 x 3
= 45
(b)
Number of more children than adults
= 15 u - 12 u
= 3 u
= 3 x 3
= 9
Answer(s): (a) 45; (b) 9