Average marks of 40 students in an examination was 25 . It was later found that marks of one student

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The average marks of $40$ students in an examination was $25 .$ It was later found that the marks of one student had been wrongly entered as $73$ instead of $37.$ What is the value of correct average

A

$24.3$

B

$24.1$

C

$24.5$

D

$24.7$

Solution

Correct average $=\frac{40 \times 25-73+37}{40}=24.1$

Standard 13

Quantitative Aptitude

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