The true probability of baby being boy = 0.519, So the true probability that a baby being girl is = 1 - 0.519 = 0.481.
We have 6 randomly selected birth
Let X be the number of baby being girl in these 6 births.
P( X is at least 1 ) = P( X 1 ) = 1 - P( none of baby being girl)
= 1 - P( X = 0 )
= 1 - ( 0.519)^6
= 1 - 0.020
Probability is = 0.980
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