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1. Two successive price increase of 10% and 10% of an article are equivalent to a single price increase of:

A. $26 \frac{2}{3}$

B. 25%

C. 21%

D. $33 \frac{1}{3}$

Solution:

100 --- 10%↑ → 110 --- 10%↑ → 121
Equivalent price increase = 21%

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