At a party,
25 of the people are adults. The remaining group of people is divided into girls and boys in the ratio of 4 : 5. Each girl is given 2 keychains and each boy is given 3 keychains. Each accompanying adult receives 4 keychains. Given that only 384 keychains are given away to girls and adults, how many more children are there than adults?
Girls |
Boys |
Adults |
3x3 |
2x3 |
4x1 |
5x1 |
|
4 u |
5 u |
6 u |
The number of children is repeated. Make the number of children the same. LCM of 3 and 9 is 9.
|
Girls |
Boys |
Adults |
Number |
4 u |
5 u |
6 u |
Value |
2 |
3 |
4 |
Total value |
8 u |
15 u |
24 u |
Number of keychains given away to girls and adults
= 8 u + 24 u
= 32 u
1 u = 384 ÷ 32 = 12
Number of children
= 4 u + 5 u
= 9 u
Number of more children than adults
= 9 u - 6 u
= 3 u
= 3 x 12
= 36
Answer(s): 36