Mathematics · Permutations and Combinations

If 27Pr+7 = 7722 × 25Pr+4, then find the value of r.

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If 27Pr+7 = 7722 × 25Pr+4, then find the value of r.

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If 27Pr+7 = 7722 × 25Pr+4, then find the value of r.

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