SOLUTION: In a certain​ country, the true probability of a baby being a boy boy is 0.518 0.518. Among the next four four randomly selected births in the​ country, what is the pr

Algebra ->  Statistics  -> Binomial-probability -> SOLUTION: In a certain​ country, the true probability of a baby being a boy boy is 0.518 0.518. Among the next four four randomly selected births in the​ country, what is the pr      Log On


   

Question 1163071: In a certain​ country, the true probability of a baby being a
boy
boy is
0.518
0.518. Among the next
four
four randomly selected births in the​ country, what is the probability that at least one of them is a
girl
girl​?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
Look at the probability that none is a girl and subtract that from 1. Everything else will be at least one.
the first is 0.518^4=0.0720
so the probabity at least 1 is a girl is 1-0.0720=0.9280.