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Histogram of number of units selected

  1. May 20, 2010 #1
    I have some things that have a 7% chance of being blue, 10 of these things are put in a box. What is the percent chance that the box will have exactly one blue thing? Two blue things? and so on..

    I have simulated this and came up with the following (all appx)
    0 - 37%
    1 - 37%
    2 - 18%
    3 - 5%
    4 - 1.2%
    5 - 0.12%

    What equations do I use to solve this exactly?
     
  2. jcsd
  3. May 20, 2010 #2

    EnumaElish

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    Prob[k out of 10 things are blue] = 10!/(k! (10 - k)!) .07^k (1 - .07)^(10 - k).
     
  4. May 21, 2010 #3
    Thanks
     
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