Some visitors paid a total of $1130 for entrance tickets to a theme park. The entrance ticket for a child cost $10. The entrance ticket for an adult cost 3 times as much. If there were 15 more adults than children, how many of the visitors were
- children?
- adults?
|
Adults |
Children |
Total |
Number |
1 u + 15 |
1 u |
|
Value |
$30 |
$10 |
|
Total value |
30 u + 450 |
10 u |
$1130 |
(a)
Cost of an adult ticket
= 3 x 10
= $30
Cost of all the adult tickets
= 30(1 u + 15)
= 30 u + 450
Total cost of the tickets
= 30 u + 450 + 10 u
= 40 u + 450
40 u + 450 = 1130
40 u = 1130 - 450
40 u = 680
1 u = 680 ÷ 40 = 17
Total number of children
= 1 u
= 17
(b)
Total number of adults
= 1 u + 15
= 17 + 15
= 32
Answer(s): (a) 17; (b) 32