(a) Draw an arrow diagram of a function from the set { 1,2,3 } to the set { a,b }

Question

(b) How many possible functions are there in part (a)?

Answer 1

It does not have to be a one-to-one function, so there are 8 possibilities for the range:

aaa

aab

aba

abb

baa

bab

bba

bbb