The average marks in Science subject of a class of 20 students is 68. If the marks of two students were misread as 48 and 65 of the actual marks 72 and 61 respectively,then what would be the correct average ?

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The average marks in Science subject of a class of 20 students is 68. If the marks of two students were misread as 48 and 65 of the actual marks 72 and 61 respectively,then what would be the correct average ?

A68.5

B69

C69.5

D70

rajesh ? Apr 29 '2017 at 20:53

Answer is 69

Explanation:

  Difference of marks = 72 + 61 - 48 - 65 = 20 

Correct average marks

\(=68 + \frac{20}{20}\)

\(=68+1\)

=\(69\)

 

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Answer is 69 Explanation:   Difference of marks = 72 + 61 - 48 - 65 = 20  Correct average marks \(=68 + \frac{20}{20}\) \(=68+1\) =\(69\)   rajesh ? answered Apr 29 '2017 at 20:53 All Comments

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