There are 4 routes between Delhi and Patna. In how many different ways can a man go from Delhi to
Channel: Doubtnut
Date: 2020-01-03

There are 4 routes between Delhi and Patna. In how many different ways can a man go from Delhi to Patna and return, if for returning (i) any of the routes is taken, (ii) the same route is taken, (iii) the same route is not taken?