Average salary per head of all workers in a workshop is Rs.,850. If average salary per head of 7 tec

English

Gujarati

Hindi

4.Average

medium

The average salary per head of all the workers in a workshop is $Rs.\,850.$ If the average salary per head of $7$ technicians is $Rs.\, 1000$ and the average salary per head of the rest is $Rs.\, 780,$ find out the total number of workers in the workshop.

A

$26$

B

$24$

C

$28$

D

$22$

Solution

Let, the total number of workers be $x$.

$\Rightarrow 850 \times x=7 \times 1000+(x-7) \times 780 \Rightarrow x=22$

Standard 13

Quantitative Aptitude

Share

Similar Questions

The average weight of $5$ persons, sitting in a boat, is $38 \,Kg$. If the average weight of the boat and the persons sitting in the boat is $52 \,Kg$, what is the weight of the boat? (in $kg$)

medium

Three $years$ ago the average age of a family of $5$ members was $17\, years.$ With the birth of a new baby, the average remains the same three even today. Find out the age of the baby.(in $years$)

medium

In a set of prime and composite numbers, the composite numbers are twice the number of prime number and the average of all the numbers of the set is $9 .$ If the number of prime numbers and composite numbers are exchanged then the average of the set of numbers is increased by $2 .$ If during the exchange of the numbers the average of the prime numbers and composite numbers individually remained constant, then the ratio of the average of composite numbers to the average of prime numbers (initially) was

hard

The sum of five numbers is $260 .$ The average of the first two numbers is $30$ and the average of the last two numbers is $70 .$ What is the third number ?

medium

The average of the boys in a class is $16\, years$ and that of girls is $15\, years.$ The average age for the whole class is

medium