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CA Foundation · Quantitative Aptitude · Index Numbers

A worker's money wage rose from ₹18,000 in the base year to ₹27,000 in the current year. The consumer price index for the current year is 180 (base year = 100). What is the percentage change in his real wage?

His real wage fell by 16.67 per cent. Deflating the current wage of ₹27,000 by the index 180 gives ₹15,000, compared with ₹18,000 in the base year. The decline of ₹3,000 on ₹18,000 is 16.67 per cent.

  1. AA decrease of 16.67%Correct
  2. BAn increase of 50%
  3. CA decrease of 10%
  4. DNo change

Explanation

Real wage = money wage / CPI × 100. Current real wage = 27,000/180 × 100 = ₹15,000. Base real wage = ₹18,000. Change = (15,000 - 18,000)/18,000 = -16.67%. The 50% option ignores the price rise.

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