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RE: Did these Kids find a way to cheat the AP test or are they the worlds smartest?
Let the aspiring actuary answer this.

Given that the chance of a randomly selected AP Micro Econ student getting a perfect score is 33/67782, the chance that 11 of 15 randomly selected AP Micro Econ students got a perfect score is

15! / (11! * 4!) * (33/67782) * (32/67781) * ... * (22/67771) * (67785/67770) * (67784/67769) * (67783/67768) * (67782/67767)

-- which I don't want to calculate, but I assure you it's low --

and this is if we assume independence.

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