the average score of a cricketer for 12 matches is 48 runs . if the average for first 8 matches is 40 , then average for last 4 matches is Choose the correct choice:
A) 33.25  B) 89  C) 64  D) 68  E) 90

Rationale: explanation : = ( 48 × 12 ) − ( 40 × 8 ) / 4 = ( 576 − 320 ) / 4 = 64 answer : option c
Answer: C