Five different roads join a village to nearby city. The no. of different ways in which a person can go to town and come back is?
5
20
25
None of these
Explanation:
If we choose 1st road, to come back we have 5 ways.
Similarly for 2nd,3rd,4th,5th road.
So, totally we have 5+5+5+5+5=25ways.