At the trampoline park, there were 75% as many boys as girls and 10% more adults than boys. Given that there were 15 less boys than adults at the trampoline park, how many children were there altogether?
| Boys |
Girls |
Adults |
| 3x10 |
4x10 |
|
| 10x3 |
|
11x3 |
| 30 u |
40 u |
33 u |
75% =
75100 =
34Boys : Girls = 3 : 4
100% + 10% = 110%
110% =
110100 =
1110 Boys : Adults = 10 : 11
The number of boys is repeated. Make the number of boys the same. LCM of 3 and 10 is 30.
Number of less boys than adults
= 33 u - 30 u
= 3 u
3 u = 15
1 u = 15 ÷ 3 = 5
Number of children
= 30 u + 40 u
= 70 u
= 70 x 5
= 350
Answer(s): 350
