SOLUTION: what is the likehood of 25 cars out of 50 passing by will be red cars, having observed in the past the probability of being 0.28?

Question 455206: what is the likehood of 25 cars out of 50 passing by will be red cars, having observed in the past the probability of being 0.28?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
what is the likehood of 25 cars out of 50 passing by will be red cars, having observed in the past the probability of being 0.28?
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mean = 0.28
std = sqrt[0.28*0.72/50] = 0.0635
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z(25/50) = z(0.5) = (0.5-0.28)/0.0635 = 3.465
===
P(p > = 0.1/2) = P(z > 3.465) = 0.000265..
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Cheers,
Stan H.
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