At a party,
13 of the people are adults. The remaining group of people is divided into girls and boys in the ratio of 3 : 5. Each girl is given 4 keychains and each boy is given 6 keychains. Each accompanying adult receives 7 keychains. Given that only 232 keychains are given away to boys and adults, how many less girls are there than boys?
Girls |
Boys |
Adults |
2x4 |
1x4 |
3x1 |
5x1 |
|
3 u |
5 u |
4 u |
The number of children is repeated. Make the number of children the same. LCM of 2 and 8 is 8.
|
Girls |
Boys |
Adults |
Number |
3 u |
5 u |
4 u |
Value |
4 |
6 |
7 |
Total value |
12 u |
30 u |
28 u |
Number of keychains given away to boys and adults
= 30 u + 28 u
= 58 u
1 u = 232 ÷ 58 = 4
Number of less girls than boys
= 5 u - 3 u
= 2 u
= 2 x 4
= 8
Answer(s): 8