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[" The number of functions "f" from "{1,...

[" The number of functions "f" from "{1,2,3,...,2}],[{1,2,3,...,20}" such that "f(k)" is a multiple of "3," where "],[" is a multiple of "4" is: "],[[" (1) "6^(5)times(15)!," (2) "5!times6!],[" (3) "(15)!times6!," (4) "5^(6)times15]]

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