Question

there are 10 buses running between delhi and agra.In how many ways can a man go from delhi to agra and return by different bus?

Answer 1

no of ways=10×9=90

10 choices for delhi to agra then 9 choices from agra to delhi as different bus to be chosen

Answer 2

Answer:

Step-by-step explanation:

there was 10 bus when he was going from Delhi to Agra ...

And when he has to return he can't use the bus from the bus he came ..so there will be 9 buses he can use

Hence, 10×9=90