Re: [理工] [機率]-機率

[cugir (烏拉拉 嚕勒勒)]

※ 引述《AAJJBurnett (叫我投手)》之銘言：
:  An urn contains two red balls and four white balls. Sample successively
:  five times at random and with replacement so that the trials are independent.
:  Compute the probability of each of the two sequence WWRWR and RWWWR.

P(WWRWR)= 4/6 * 4/6 * 2/6 * 4/6 * 2/6
P(RWWWR)= 2/6 * 4/6 * 4/6 * 4/6 * 2/6


P(WWRWR)=P(RWWWR)=(4/6)^3*(2/6)^2


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