Last year, 5 companies had an average of 16 non working days each, and 2 companies had 5 fewer non w

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Last year, $5$ companies had an average of $16$ non working days each, and $2$ companies had $5$ fewer non working days each. What was the average number of non working days given by the same companies this $year$ ?

A

$12$

B

$18$

C

$20$

D

$22$

Solution

No. of Non working days of $3$ companies $=16 \times 3+$ $30=78$

No of Non working days of $2$ companies $=16 \times 21-10$ $=22$

$\therefore$ Average $=\frac{78+22}{5}=\frac{100}{5}=20$

Standard 13

Quantitative Aptitude

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