The average salary of all the workers in a workshop is Rs. 9500. 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 option:
A) 23  B) 21  C) 52  D) 56  E) 12

Rationale: let the total number of workers be x . then , 9500 x = ( 12000 * 7 ) + 6000 ( x - 7 ) = > 3500 x = 42000 = x = 12 . answer : e
Answer: E