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Thread: Counting Question

  1. #1
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    Counting Question

    Question: If I had X number of train cars and I wanted to know the probability of having Y or more people in a car when I have N total of people. How would I go about solving this?

    I thought that this would be a good example of a SUM from k = Y -> N of combination(N k) ; however, my number does not seem to make sense. I have been stuck on this problem for a while now and I am not sure what the correct path is to solving it. Any and all advice would be helpful in understanding and solve this type of problem.

    Thanks in advance!

  2. #2
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    Re: Counting Question


    You may first take a look at the above link. Also note that requiring a specific car is different from at least one of the car having Y or more people.
    Last edited by Dason; 09-30-2013 at 09:09 AM.

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