CMA Foundation · Fundamentals of Business Mathematics and Statistics · Measures of Central Tendency and Dispersion
The mean wage of 40 workers in a Coimbatore factory is ₹600 per day. If each worker is given a rise of 10% of wages and then an additional allowance of ₹20 per day, what is the new mean daily wage?
The new mean daily wage is ₹680. The mean is multiplied by 1.10 for the 10% rise, giving ₹660, and then the flat allowance of ₹20 is added to the mean, giving ₹680.
- A₹680Correct
- B₹660
- C₹620
- D₹700
Explanation
New mean = 600 × 1.10 + 20 = 660 + 20 = 680. Option ₹660 omits the allowance, and ₹620 wrongly adds 20 before ignoring the rise.
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