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re: Cashier at store told me one guy has spent $4000 on Powerball
Posted on 1/13/16 at 3:21 pm to slackster
Posted on 1/13/16 at 3:21 pm to slackster
quote:I actually envisioned it like the Birthday Problem LINKwhereas the probability is calculated by the total possible pairs.
My math could be wrong, because this thread is full of funky math, but I believe the probability of the QPs picking 2000 random numbers without repeating any of the same combinations is 99.317536%, so it is pretty safe to assume they were all unique.
Basically, if you randomly took 23 people, and asked what the probability that 2 of those individuals share a birthday, it may be intuitive to say 6.3% (23/365) but the true probability 50.7%. This is because we are looking at all possible pairs.
So if this is the correct way to look at it (which I believe it is), then there is roughly a little over 6% chance that you'll draw the same combination twice.
Posted on 1/14/16 at 11:22 am to buckeye_vol
Bump for this guy who feels like a dick this morning
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