What is the probability that you will again meet a person on a plane (flying one)?

**Details and Assumption**

- There is only one plane company
- You cannot Hack into the company server nor you can get any information about the person
- You have the worst luck and still there is a chance you will meet him/her.
- Every person only travels on plane.
- Nor u can take his/her number or ask him/her which flight they have taken.
- You only know that when the person is travelling and it corresponds to your date.
- No. of planes per day is between 1000 to 10000000.
- No. of persons in a plane is 8000 (always)
- No. of persons in the country \(10^{10}\).
- Flight cannot get cancelled
- No one misses the flight.

*Actually I met my old friend on a plane recently, So I came up with this problem*

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## Comments

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TopNewestYou cannot determine the probability.What if you meet a person on a plane and that person never flies on a plane again?

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I have edited it please review.

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Still you need to know how many planes leave per day and how many people can be there is a plane.

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I don't get it. How many flights are there supposed to be per day? Will he certainly take a flight? Will you certainly take a flight? If so, is it on the same day? How many people are there on the plane? (If that is relevant, expecting fully booked planes to stack to next plane). Do you know his flight time? Too many factors.

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@Brian Charlesworth, @Otto Bretscher, @Calvin Lin, @Chew-Seong Cheong, @Rajdeep Dhingra

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@Lakshya Sinha There are

tonsof affecting the probability. Even if you are able to list all the factors, the probability will be very very small.Log in to reply

Wow, the probability is very low. It is not easy to calculate. Although I am in my profession (I am conducting due diligence), I do a lot of calculations, read about it <a target="_blank" rel="nofollow" href="http://en.clc.co.ua/due-diligence-ukraine/">click here</a>. I certainly will not calculate the probability, but I calculate the risks for business buyers.

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