There are 10 buses running between Delhi and Agra. In how many ways can a man go from Delhi to Agra and return by a different bus?

There are 10 buses running between two towns X and Y. In how many ways can a mango from X to Y and return by a different bus ?

There are 15 buses running between Lucknow and Kanpur. In how many ways can a man go to Kanpur and return by a different bus?

There are 6 trains running between New Delhi and Darbhanga. In how many ways can a man go from New Delhi to Darbhanga and return by a different trains?

There are 6 trains running between New Delhi and Darbhanga. In how many ways can a man go from New Delhi to Darbhanga and return by a different trains?

There are 6 trains running between Indore and Bhopal . In how many ways can a man go from Indore to Bhopal and return by a different train ?

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?

From Panipat to Delhi there are 10 buses. In how may ways can Pooja go from Delhi to Panipat and return on a same day by a different bus after attending a function ?

From Panipat to Delhi there are 10 buses. In how may ways can Pooja go from Delhi to Panipat and return on a same day by a different bus after attending a function ?

There are 4 ways between Delhi and Mumbai. In how many ways can a person comes back after going from Delhi to Mumbai if he returns (i) with the same way? (ii) with any way? (iii) with any remaining way?

There are 4 routes between Delhi and Patna. The number of ways a man can gfrom Dellif to Patna and return,if for returning Any of the routes is taken is