SOLUTION: Ziggy and Samantha are planning to have four children. If the probability of a girl is 0.51, what is the probability they will have at least 2 girls or exactly one boy

Question 428017: Ziggy and Samantha are planning to have four children. If the probability of a girl is 0.51, what is the probability they will have at least 2 girls or exactly one boy
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Ziggy and Samantha are planning to have four children. If the probability of a girl is 0.51, what is the probability they will have at least 2 girls or exactly one boy
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P(g>=2 of 4) = 1- binomcdf(4,0.51,1) = 1 - 0.2977 = 0.7023
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P(b = 1) = 4C1(0.49)*(0.51)^3 = 0.2600
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P(g>=2 OR b=1) = P(g>=2)+P(b=1)
= 0.7023+0.2600
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= 0.9623
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Cheers,
Stan H.
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