Task: Question Answering
Input (English): Problem: 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 
Options: a ) 20 , b ) 21 , c ) 22 , d ) 23 , e ) 24
Output (English): b