Answer:
150 tickets were sold at $35
200 tickets were sold of $25
Step-by-step explanation:
a*25+b*35=10250
a +b = 350 | * -25
25a + 35b= 10. 250
-25a -25 b= -8.750
------------------------------
 10b = 1500
 b=1500:10
 b=150 tickets cost 35 $
 a= 350-150
 a= 200 tickets cost 25 $