SOLUTION: On average, 40 percent of US beer drinkers order light beer. a) What is the probability that none of the next eight customers who order beer will order light beer? b) That one

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Question 276206: On average, 40 percent of US beer drinkers order light beer.
a) What is the probability that none of the next eight customers who order beer will order light beer?
b) That one customer will?
c) Two customers?
d) Fewer than three?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
On average, 40 percent of US beer drinkers order light beer.
Each is a Binomial problem with p = 0.40
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a) What is the probability that none of the next eight customers who order beer will order light beer?
n = 8 ; x = 0
P(x=0) = 8C0(0.4)^0*(0.6)^8 = 0.0168
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b) That one customer will?
P(x=1) = 8C1(0.4)*(0.6)^7
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Same procedure as above.
c) Two customers?
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d) Fewer than three?
P(0<= x <=2) = binomcdf(8,0.4,2) = 0.3154...
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Cheers,
Stan H.