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 choice from the following
A) 20  B) 21  C) 42  D) 23  E) 24
Solution   Let the toatl number of workers be x.   Then 8000x=(18000 x 7) + 6000 (x -7)   x= 42   Answer 42
<result>C</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