SOLUTION: In a city the probability that a person will pass his or her driving test the first attempt is 0.66. Four people are selected at Random from among those taking their driving test f

Question 619563: In a city the probability that a person will pass his or her driving test the first attempt is 0.66. Four people are selected at Random from among those taking their driving test for the first time. Determine the following:
a. The probability that exactly one person passed
b. The probability that at least two persons passed the test
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
In a city the probability that a person will pass his or her driving test the first attempt is 0.66. Four people are selected at Random from among those taking their driving test for the first time.
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Binomial Problem with n = 4 and p(pass) = 0.66
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Determine the following:
a. The probability that exactly one person passed
P(x = 1) = 4C1*(0.66)*(0.34)^3 = binompdf(4,0.66,1) = 0.1038
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b. The probability that at least two persons passed the test
P(2<= x <=4) = 1 - binomcdf(4,0.66,1) = 0.8829
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Cheers,
Stan H.

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