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CA Foundation · Quantitative Aptitude · Index Numbers

Given Σp0q0 = 200, Σp1q0 = 260, Σp0q1 = 250 and Σp1q1 = 300, which statement is correct?

Laspeyres is 130 and Paasche is 120. Laspeyres divides Σp1q0 (260) by Σp0q0 (200), while Paasche divides Σp1q1 (300) by Σp0q1 (250). Each is then multiplied by 100.

  1. ALaspeyres index is 120 and Paasche index is 130
  2. BLaspeyres index is 130 and Paasche index is 120Correct
  3. CLaspeyres index is 130 and Paasche index is 124
  4. DBoth indices are equal to 125

Explanation

Laspeyres = 260/200 × 100 = 130. Paasche = 300/250 × 100 = 120. The first option swaps the two indices, a common mistake of mixing the formulae.

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