Question. a student got 70% in one subject,80% in other.to get overall 75% how much he should get in third subject.
Options:
(A) 65%
(B) 75%
(C) 85%
(D) 95%
(E) 88%
Answer. (B)
What step-by-step reasoning justifies that answer?
Reasoning: Already average of two subjects is (70+80)/2 = 75%
To maintain the percentage at 75%, he shouls get 75% marks in third subject