Question

3. Two finite sets A and B have m and n elements respectively. If the total number of relations from A
to B is 64, then the possible values of m and n can be
(a) 1 and 5
(b) 2 and 4
(c) 2 and 3
d) 1 and 4​

Answer 1

C2and 3

2^2=4& 4^3=64