The average salary of all the workers in a workshop is Rs. 8,000. The average salary of 7 technicians is Rs.12,000 and the average salary of the rest is Rs. 6,000. The total number of workers in the workshop is :

[ A ] 21

[ B ] 20

[ C ] 23

[ D ] 22

[ E ] None of these

Answer : Option
A

Explanation :

Let the total no. of workers be x. Now, 8000 x = 7 $\times$ 12000 + (x - 7) $\times$ 6000 x = $42000 \over 2000$ = 21