The average marks of 25 students is 70. If the marks of one student were misread as 80 instead of 60, find the correct average. MCQ with Answer and Explanation

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The average marks of 25 students is 70. If the marks of one student were misread as 80 instead of 60, find the correct average.

A. 70.0

B. 69.2

C. 69.8

D. 68.8

Answer: Option B

Solution (By JKExamLibrary)

Total sum misread =25×70=1750. Correct sum =1750 -80 +60 =1730. Correct average =1730/25=69.2.

This question belongs to: Maths Average

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