1.  The average salary of all the workers in a workshop is ₹ 8000. The average salary of 7 technicians is ₹ 12000 and the average salary of the rest is ₹ 6000. The total number of workers in the workshops is :

A. 20
B. 21
C. 22
D. 23

Answer: Option B

Explanation:

Let the total number of workers be X. Then,
8000X = (12000 x 7) + 6000 (X - 7)
<=> 2000X = 42000
<=> X = 21