At a party,
14 of the people are adults. The remaining group of people is divided into girls and boys in the ratio of 2 : 3. Each girl is given 2 keychains and each boy is given 4 keychains. Each accompanying adult receives 7 keychains. Given that only 568 keychains are given away to boys and adults, how many less girls are there than boys?
Girls |
Boys |
Adults |
3x5 |
1x5 |
2x3 |
3x3 |
|
6 u |
9 u |
5 u |
The number of children is repeated. Make the number of children the same. LCM of 3 and 5 is 15.
|
Girls |
Boys |
Adults |
Number |
6 u |
9 u |
5 u |
Value |
2 |
4 |
7 |
Total value |
12 u |
36 u |
35 u |
Number of keychains given away to boys and adults
= 36 u + 35 u
= 71 u
1 u = 568 ÷ 71 = 8
Number of less girls than boys
= 9 u - 6 u
= 3 u
= 3 x 8
= 24
Answer(s): 24