A 2-week pass to all art galleries for one person costs $250. The management gives a concession to a group of 50 tourists. For every 3 tourists who purchase the 2-week pass, the 4th tourist gets free access to the art galleries. How much does each tourist pay in this arrangement if they share the total cost equally?
For every 3 tourists, 4th tourist gets free access.

Number of tourists in eact set
= 3 + 1
= 4

Number of sets of 4 tourists
= 50 ÷ 4
= 12 r 2 

There are 12 sets of 4 tourists in 50 tourists, so 12 tourists will get free access.

Number of tickets to be paid for
= 50 - 12
= 38

Total cost of tickets
= 38 x 250
= $9500

Cost for each tourist
= 9500 ÷ 50
= $190
 
Answer(s): $190