The average salary of all the workers in a workshop is Rs. 8000. The average salary of 7 technicians is Rs. 18000 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) 42 C) 22 D) 23 E) NONE
Sol.   Let the total number of workers be x. Then,   8000x = (18000 × 7) + 6000 ( x – 7)   ‹=› 2000x = 84000   ‹=› x = 42.   Answer 42
<result>B</result>
The average salary of all the workers in a workshop is Rs. 8000. The average salary of 7 technicians is Rs. 18000 and the average salary of the rest is Rs. 6000. The total number of workers in the workshop is