Question

A contractor employed $18$ labourers at Rs. $12$ per day, $10$ labourers at Rs.$13.50$ per day,$5$ labourers at Rs.$25$ per day and $2$ labourers at Rs.$42$ per day. The average wage of a labourer per day is

• A. Rs. $16$
• B. Rs. $20$
• C. Rs.$24$
• D. Rs. $28$

Answer 1

Answer: (A)

Rs. $16$

Mean = $\frac{TotalSum}{TotalCount}$

Mean = $\frac{18\times 12+10\times 13.50+5\times 25+2\times 42}{18+10+5+2}$
= $\frac{560}{35}$
$=16$