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The CP of 21 articles is equal to SP of18 articles. The gain or loss
Percent is:

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10%

12%

answer is A.

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Detailed Solution

Concept: We can find the gain and loss percentages given articles.
21 articles = x Rs
CP of 1 article =

18 articles =x Rs
SP of 1 article=

Gain =SP-CP=

Gain formula is

Hence, the correct option is (1) .

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