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OpenStudy (anonymous):
a pet owner has parakeets which 20% are blue, he orders 3 parakeets from another store, if he selects the parakeets at random, whats the chance that the pet store gets exactly one blue parakeet.
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OpenStudy (anonymous):
0.432 sorry for the long answer BTW welcome to openstudy!
OpenStudy (kropot72):
\[\large P(1\ blue)=C(3,\ 1)\times0.2^{1}\times0.8^{2}=0.384\]
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