The number of functions f from `{1,2,3,…,20}` onto `{1,2,3,…….20}` such that f (k) is a multiple of 3 whenever k is a multiple of 4 is:

If set A={1, 2, 3, ...,20 }, then the find the number of onto functions from A to A such that f(k) is a multiple of 3, whenever k is a multiple of 4. (A) 6^5xx15! (B) 5^6xx15! (C) 6!xx5! (D) 6!xx15!

If set A={1, 2, 3, ...,20 } , then the find the number of onto functions from A to A such that f(k) is a multiple of 3, whenever k is a multiple of 4. (A) 6^5xx15! (B) 5^6xx15! (C) 6!xx5! (D) 6!xx15!

If set A={1, 2, 3, 20, } , then the find the number of onto functions from A to A such that f(k) is a multiple of 3, whenever k is a multiple of 4. (A) 6^5xx15! (B) 5^6xx15! (C) 6!xx5! (D) 6!xx15!

If set A={1, 2, 3,...20 } , then the find the number of onto functions from A to A such that f(k) is a multiple of 3, whenever k is a multiple of 4. (A) 6^5xx15! (B) 5^6xx15! (C) 6!xx5! (D) 6!xx15!

If set A={1, 2, 3, 2 } , then the find the number of onto functions from A to A such that f(k) is a multiple of 3, whenever k is a multiple of 4. (A) 6^5xx15! (B) 5^6xx15! (C) 6!xx5! (D) 6!xx15!

The number of onto function f:A rarr B where {1,2,3,4,5,6) and B={1,2,3 is

Statement-1: The number of onto function f from A={1,2,3,4,5,6} to B={7,8,9} such that f(i)<=f(j) for ' i

If the number of onto functions from [1,2,3,4}rarr{2,3,4} such that f(1)!=i for i=1,2,3,4 is k then (k)/(4) is equal to