Question:
The average monthly salary of the workers in a workshop is Rs. 8500. If the average monthly salary of 7 technicians is Rs. 10000 and average monthly salary of the rest is Rs. 7800, the total number of workers in the workshop is
A18
B20
C22
D24
Answer:
C. 22
Explanation:
Let the total number of workers be x. Then (7 x 10000) + (x - 7) * 7800 = 8500 x => 70000 + 7800x - 54600 => 8500x => 700x = 15400 => x = 22
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