Average marks in English subject of a class of 24 students is 56 . If marks of three students were m

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Gujarati

Hindi

4.Average

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The average marks in English subject of a class of $24$ students is $56 .$ If the marks of three students were misread as $44,45$ and $61$ of the actual marks $48,59$ and $67,$ respectively, then what would be the correct average?

A

$56.5$

B

$59$

C

$57.5$

D

$57$

Solution

Total marks of $24$ students $= \,24 \times56$

$=1344$

New total marks of $24$ students

$=1344-44-45-61+48+59+67=1368$

Hence, the required average $=\frac{1368}{24}=57$

Standard 13

Quantitative Aptitude

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