4. The average monthly wages of total employees in a company is Rs. 8500. If average monthly wages of 7 officers is Rs. 10,000 and average monthly wages of remaining employees is Rs. 7800, then find the total number of employees working in that company? (A) 20 (B) 21 (C) 22 (D) 24
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Let the total number of workers in the workshop be x.
Then, number of other workers (besides technicians) = (x - 7)
Given, (x - 7) x 7800 + 7 x 10000 = 8500x
⇒ 7800x - 54600 + 7000 = 8500x
⇒ 700x = 15400 ⇒ x =
700
15400
⇒x=22
OPTION C ) 22
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