Question 951583: BINOMIAL DISTRIBUTION
Last Question.A city law enforcement official has started that 20% of the items sold by pawn shops within the city have been stolen. ralph has just purchase 4 items from one of the city's pawn shops. assuming that the official is correct and fo the X= the number of ralph purchases that have been stolen, determine the following
a) E(x)
b) P(X=0)
c) P(x=2)
d) formula and solution
Thank you
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A city law enforcement official has stated that 20% of the items sold by pawn shops within the city have been stolen. ralph has just purchase 4 items from one of the city's pawn shops. assuming that the official is correct and fo the X= the number of ralph purchases that have been stolen, determine the following
a) E(x) = np = 4*0.2 = 0.8
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b) P(X=0) = 0.8^4 = 0.4096
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c) P(x=2) = 4C2(0.2)^2*(0.8)^2 = binompdf(4,0.02,2) = 0.0023
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d) formula and solution ?????
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Cheers,
Stan H.
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