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?

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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
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P(p > = 0.1/2) = P(z > 3.465) = 0.000265..
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Cheers,
Stan H.
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