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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 workshop is
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- 20
- 21
- 23
- 22
- 20
Correct Option: B
Let the total number of workers be n.
Total salary of all the workers = 8000n
Total salary of 7 technicians = 7 × 12000 = ₹84000
Total salary of (n – 7) workers = (n – 7) 6000
∴ (n – 7) 6000 + 84000 = 8000 n
⇒ 8000n – 6000n = 84000 – 42000
⇒ 2000n = 42000
⇒ n = 42000 ÷ 2000 = 21
