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	Pick:
A) 20  B) 21  C) 22  D) 23  E) 24
Solution   Let the toatl number of workers be x.   Then 8000x=(12000 x 7) + 6000 (x -7)   2000x =42000   x= 21.   Answer 21
<result>B</result>
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