A student gets 60% in one subject, 80% in the other. To get an overall of 75% how much should get in third subject.
Choose one:
A) 75 %
B) 25 %
C) 85 %
D) 55 %
E) 65 %

Rationale: let the 3 rd subject % = x 60 + 80 + x = 3 * 75 140 + x = 225 x = 225 - 140 = 85 answer : c
Answer: C