In how many ways can you go from A to B and return A from a different – InterviewSolution

1.

In how many ways can you go from A to B and return A from a different route, if there are 10 ways of travelling from A to B.

Answer»

The number of ways to travel from A to B is 10 ways. The number of ways to return from B to A in a different route is 9 ways.

∴ The total number of ways = 10 × 9 = 90 ways.

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