Some visitors paid a total of $1665 for entrance tickets to a theme park. The entrance ticket for a child cost $9. The entrance ticket for an adult cost 4 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 |
$36 |
$9 |
|
Total value |
36 u + 540 |
9 u |
$1665 |
(a)
Cost of an adult ticket
= 4 x 9
= $36
Cost of all the adult tickets
= 36(1 u + 15)
= 36 u + 540
Total cost of the tickets
= 36 u + 540 + 9 u
= 45 u + 540
45 u + 540 = 1665
45 u = 1665 - 540
45 u = 1125
1 u = 1125 ÷ 45 = 25
Total number of children
= 1 u
= 25
(b)
Total number of adults
= 1 u + 15
= 25 + 15
= 40
Answer(s): (a) 25; (b) 40