Question

complete the number of function from X={a,b,C,d,e} to Y={P,q,r}​

Answer 1

Answer:

For every element of set A, there are two choices in set B.

Hence the number of function from set A to set B are 2

5

.

Out of these functions one function maps, all the elements of set A are mapped to only one element, a of set B. and the other function maps all the elements of set A are mapped to the other element, b of set B. Hence these two functions are not surjective. therefore the number of onto functions from setA to set B are 32−2=30