there are 10 buses operating between places A and B. In how many ways a person can go from place A to place B and return place A, if he returns in a different bus
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Step-by-step explanation:
It seems like a question of probability. Does my answer would contain content more than calculations.
If a guy goes in a bus one from a to b then he has 9 buses left to return.
Hence, he has nine probabilities out of 10 of going to point A. Considering this for other buses as well then he would have 9 × 9 ways to return back from point B.
Does your answer is 9 x 9 that is 81 ways.
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