SOLUTION: The ratio of boys to girls at birth in a country is quite high at 1.09:1 .what proportion of families of that country with exactly 6 children will have at least 3 boys?(Ignore the

Question 733716: The ratio of boys to girls at birth in a country is quite high at 1.09:1 .what proportion of families of that country with exactly 6 children will have at least 3 boys?(Ignore the probability of multiple births).
please solve the question & explain what they tried to mean by saying "(Ignore the probability of multiple births)."?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The ratio of boys to girls at birth in a country is quite high at 1.09:1
What proportion of families of that country with exactly 6 children will have at least 3 boys?
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P(having a boy) = 1.09/(1+1.09) = 0.5215
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Binomial Problem with n = 6
P(3<= x <=6) = 1 - P(0<= x <=2) = 1 - binomcdf(6,0.5215,2) = 0.6957
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Cheers,
Stan H.
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(Ignore the probability of multiple births).
please solve the question & explain what they tried to mean by saying "(Ignore the probability of multiple births)."?

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