Answer: student = 45 ticket sold, adult = 75 ticket sold.
Explanation:
Assume that all the ticket sold were adult ticket:
120 x 2$ = 240$
Then:
240$ - 195$ = 45$
Calculate the difference between student ticket and adult ticket:
2$ - 1$ = 1$
Find the student ticket:
45$/1$ = 45
45 ticket sold is the student ticket.
Find adult ticket sold:
120 - 45 = 75
75 ticket sold is the adult ticket.
Check:
(45 x 1) + (75 x 2) = 195
45 + 150 = 195
195 = 195
