There are 5 buses that run between Coimbatore and Chennai. If a man takes a bus from Coimbatore to Chennai and then another bus back to Coimbatore, what are the total possible routes?
There are 5 buses that run between Coimbatore and Chennai. If a man takes a bus from Coimbatore to Chennai and then returns to Coimbatore.
Now, if a man travels from Coimbatore to Chennai, he has 5 options.
When he returns, he only has 4 options because he will not be returning with the same bus.
As a result, the total number of ways is given by,
Therefore, the number of ways is 20.
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