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ATQ,
Quantity I, Let the CP of article be= x Rs. (x × 1.36 - 168)/(x × 1.28 - 144) = 19/18 18 × (1.36x - 168) = 19 × (1.28x - 144) 24.48x - 3024 = 24.32x - 2736 0.16x = 288 x = 1800 Rs. Quantity II, {1 + (x - 1)/100}2- 1 = 2646/12600 {1 + (x - 1)/100}2 = 1 + 0.21 = 1.21 1 + (x - 1)/100 = 1.1 x - 1 = 10 x = 11 x + 4 = 11 + 4 = 15% CI = 5600 × (1.152- 1) = 5600 × 0.3225 = 1806 Rs. Quantity I < Quantity II
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