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[ask] floating number probability

Dimulai oleh HyawehHoshikawa, Oktober 17, 2012, 09:43:46 PM

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HyawehHoshikawa

may i ask?
I have 30 balls,
5 of which is colored bloody red,
someone then pulled 5 random balls

the probability of pulling no ball colored bloody red is 37%
// f(1) = 37%;
the probabilty of pulling at most 1 ball colored bloody red is 81%
// f(2) = 81%;

then how much ball is pulled at 50%?
// f'(50%) = ?

thank you.
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