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The probability it will rain is 40 percent each day over a five-day period what is the probability that is will rain on exactly three or four of the five days?
Jadant
P(Rain) = 0.4
P(No Rain) = 0.6
P(Rain on 3 out of 5 days) = 5C3x(0.6)^2x(0.4)^3 = 0.2304
P(Rain on 4 out of 5 days) = 5C4x(0.6)^1x(0.4)^4 = 0.0768
So P(Rain 3 or 4 out of 5 days) = 0.2304 + 0.0768 = 0.3072
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