Consider two sets A = { 2 , 3 , 5 , 7 , 11 , 13 } A = {2, 3, 5, 7, 11, 13} A = { 2 , 3 , 5 , 7 , 11 , 13 } and B = { 1 , 8 , 27 } B = {1, 8, 27} B = {...
Question
Consider two sets
and
. Let
be a function from
to
such that for every element
in
, there is at least one element
in
such that
. Then, the total number of such functions
is: