Blood Type Question

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trackgirl000

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Jan 30, 2007
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Approximately 40% of the California popuation has type O blood. If 4 persons are selected at random to be donors, find P[at least one type O].
 
The opposite of 'at least one' is none. Find the probability of none and subtract from 1


\(\displaystyle \L\\1-C(4,0)(0.40)^{0}(0.60)^{4}\)
 
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