The average salary of all the workers in a workshop is Rs. 8000. The average salary of 7 technicians is Rs. 12000 and the average salary of the rest is Rs. 6000. The total number of workers in the workshop is :

The average salary of all the workers in a workshop is Rs. 8000. The average salary of 7 technicians is Rs. 12000 and the average salary of the rest is Rs. 6000. The total number of workers in the workshop is :

A 20

B 21

C 23

D 24

Solution

Correct Answer: Option B

Lot the total number of workers be v Then,

8OOOv = (12000 \(\times\) 7) + 6000 (v - 7) <=> 2000v = 42000 <=> v = 21.