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	Choose the correct answer:
A) 20 B) 21 C) 22 D) 23 E) NONE
Sol.   Let the total number of workers be x. Then,   8000x = (12000 × 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