YOUR QUESTION :

How many relations are there on {1,2,3,4,5}?

How many equivalence relations are there on {1,2,3}?

How many reflexive relations are there on {1,2,3,4,5}?

How many functions are there from {1,2,3} to {a,b,c,d}?

How many surjective functions are there from {1,2,3,4,5} to {a,b,c,d,e}?

How many bijective functions are there from {1,2,3,4} to {a,b,c}?

I know the definitions, but somehow I cant seem to apply

them.. can someone please help with the answers... it will

serve as an example... THANKYOUUU!

zee