A student scored 67% in five subjects having maximum marks 100 each. How many marks should he score in the sixth subject (max 100) to raise his average to 71%?
Show answer & explanation
Correct answer: C
Explanation
Given:
Average of 5 subjects = 67%
New average (6 subjects) = 71%
According to the formula:
Sum = Average × Number
Total for the first 5 subjects = 67 × 5 = 335
Total for 6 subjects = 71 × 6 = 426
Marks in the sixth subject = 426 − 335 = 91