1.

 The number of partitions of {1, 2, 3, 4, 5} into three blocks is S(5, 3) = 25. The total number of functions f : {1, 2, 3, 4, 5} → {1, 2, 3, 4} with |Image(f)| = 3 is

A. 4 × 6
B. 4 × 25
C. 25 × 6
D. 4 × 25 × 6
Answer» E.


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