If and , how many injective (one-one) functions exist from to…

MATHEMATICS · Single correct · CBSE · Mathematics · Permutations and Combinations · Permutations and Combinations

Problem

If ∣A∣=4|A|=4 and ∣B∣=7|B|=7, how many injective (one-one) functions exist from AA to BB? (a) 3535 (b) 840840 (c) 24012401 (d) 210210

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