In this question, sum of numbers is provided, nut required sum (i.e. $A + B+ C+ D + E$) cannot be calculated by the given data.
Therefore the answer is Data inadequate.
Moderate Averages Question - 10
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: