Question - Vedclass

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4.Average

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The average weight of $45$ students in a class was calculated as $36 \,kg$. It was later found that the weight of two students in the class was wrongly calculated. The actual weight of one of the boys in the class was $32 \,kg ,$ but it was calculated as $34$ $kg ,$ and the weight of another boy in the class was $45 \,kg ,$ whereas it was calculated as $40 \,kg$. What is the actual average weight of the $45$ students in the class ? (in $kg$) (Rounded off to two-digits after decimal)

A

$36.07$

B

$36.16$

C

$35.84$

D

Cannot be determind

Solution

Average $=\frac{(45 \times 36)+32-34+45-40}{45}$

$=\frac{1620+3}{45}=36.07\, kg$

Std 13

Quantitative Aptitude

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