3 sets of 40 , 50 and 60 students appeared for an examination and the pass percentage was 100 , 90 and 80 respectively . the pass percentage of the whole set is Select:  A) 88.33  B) 84.33  C) 88.66  D) 84.66  E) none of these

Rationale: total passed student = 40 + 45 + 48 = 133 133 is 88.66 % of 150 answer : c
Answer: C