No. of one-one functions from set \( A \) to set \( B \), where \( ... VIDEO
No. of one-one functions from set \( A \) to set \( B \), where \( n(A)=3, n(B)=5 \) is
\( \mathrm{P} \)
(1) 60
(2) 20
(3) 45
(4) 5
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