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If the set A contains 5 elements and the set B contains 6 elements, then the number of one-one and onto mappings from A to B is

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If the set A contains 5 elements and the set B contains 6 elements, then the number of one-one and onto mappings from A to B is

(A) 720 

(B) 120

(C) 0 

(D) none of these

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Answer is (C)

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