Average salary per head of all workers of an institution is Rs. ,60,. average salary per head of 12

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The average salary per head of all workers of an institution is $Rs. \,60\,.$ The average salary per head of $12$ officers is $Rs. \,400 .$ The average salary per head of the rest is $Rs.$ $56 .$ Then, the total number of workers in the institution is?

A

$1030$

B

$1032$

C

$1062$

D

$1060$

Solution

Let the total number of workers $=x$

According to the question

$60 x=12 \times 400+56(x-12)$

$60 x-56 x=4800-672$

$4 x=4128 \Rightarrow x=1032$

Standard 13

Quantitative Aptitude

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