1.

A function is defined by mapping f:A B such that A contains m elements and B contains n elements and m > n then number of bijections are ________

A. <sup>n</sup>C<sub>m</sub> x m!
B. <sup>n</sup>C<sub>m</sub> x n!
C. 0
D. none of the mentioned
Answer» D. none of the mentioned


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