jelly bean p(n) = 1 x (1-1/39) x (1-2/39) x (1 - (n-1)/39)

• • Assume you have a bag of 500 jelly beans. There are 40 different flavors. How many jelly beans must you randomly pick from the bag until the odds of drawing two of the same flavor is better than 50/50?
    
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  • How many jelly beans must you pick to get better than 50/50 odds to get two alike?1/19/2015 4:11PM - in reply to fisky
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    It depends on what color the jelly beans you pick are. If the first two you pick are the same color, you can stop there. If not, you need to keep going!

• george oscar bluth
• • RE: How many jelly beans must you pick to get better than 50/50 odds to get two alike? 1/19/2015 4:16PM - in reply to fisky
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    In a rush here, but I think...
    
    p(n) = 1 x (1-1/39) x (1-2/39) x (1 - (n-1)/39)
    Would be the probability of not having two of the same type. You would get to 50% at 8 beans I believe.

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