There are 12 steamers plying between A and B. In how many ways could the round trip from A be made if the return was made on (i) the same steamer? (ii) a different steamer?

If there are 20 steamers plying between places A and B, in how many ways could the round trip from A be made if the return was made on : the same steamer ?

If there are 20 steamers plying between places A and B, in how many ways could the round trip from A be made if the return was made on : a different steamer ?

If there are 20 buses playing between places A and B, in how many ways can a round trip from A be made if the return journey was made on: i. the same bus, ii. a different bus.

If there are 20 buses playing between places A and B, in how many ways can a round trip from A be made if the return journey was made on: i. the same bus, ii. a different bus.

Ten buses are plying between two places A and B. In how many ways a person can travel from A to B and come back?

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 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 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?