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Find x if nPr = x nCr - Mathematics and Statistics

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प्रश्न

Find x if nPr = x nC

बेरीज
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उत्तर

nPr = x nC

We know that nCr = `(""^"n""P"_"r")/("r"!)`

nPr = `x xx (""^"n""P"_"r")/("r"!)`

∴ 1 = `x/("r"!)`

∴ x = r!

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पाठ 3: Permutations and Combination - Exercise 3.6 [पृष्ठ ६५]

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बालभारती Mathematics and Statistics 2 (Arts and Science) [English] Standard 11 Maharashtra State Board
पाठ 3 Permutations and Combination
Exercise 3.6 | Q 17 | पृष्ठ ६५
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