In an examination, the average marks of six students is 50. During cross-checking, the marks of one student were found misread as 48 instead of 84. Find the correct average marks.
A52
B54
C56 ✓ Correct
D58
Correct answer: (C) 56
Explanation
The correct average is 56.
The wrong total = 6 x 50 = 300.
The misread mark understates by 84 - 48 = 36.
Correct total = 300 + 36 = 336.
Correct average = 336 / 6 = 56.
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