Of the 5 subjects, the average marks of Rakesh in first 3 subjects was 75 and the average marks in the last 3 subjects was 82. If his marks in the third subject was 66, then what was his average marks in all the 5 subjects?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 81.
Total marks in first three subject = 75 × 3 = 225
Total marks in the last 3 subjects = 82 × 3 = 246
Total marks Rakesh scored in all 5 subjects = 225 + 246 - 66 = 405
Average = 405/5 = 81
Hence, Rakesh's average mark in all 5 subjects was 81.