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Homework Help: Birthday probability

  1. Nov 12, 2005 #1
    this is the problem...
    there are 25 students in a Data Management Class. Determine the probability that at keast two of them share the same birthday. (Assume that every year has 365 days)
    --> i have no clue what technique what to do here... coz this is a thinking question so its kinda hard for me...
     
  2. jcsd
  3. Nov 12, 2005 #2
    Well, the way to do this is to work out the probability of each of them having different birthdays, then subtract that from 1. For starters, if there were only 2 people in the class, what is the probability that they would have different birthdays?
     
  4. Nov 12, 2005 #3
    is it 1-(364/365)?
     
    Last edited: Nov 12, 2005
  5. Nov 13, 2005 #4
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