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OpenStudy (anonymous):
A woman is expecting triplets. What is the probability that there are 2 girls and 1 boy? What is the probability that all 3 babies are girls?
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OpenStudy (anonymous):
25% because there are 4 possibilities
OpenStudy (anonymous):
@abracadabra would you mind doing it out?
OpenStudy (anonymous):
3g0b 2g1b 1g2b 0g3b those are all the possibilities, so one of those is 25%
OpenStudy (anonymous):
g=girl b=boy get it?
OpenStudy (anonymous):
yes, we are supposed to be doing this with the binomial probability P(r) = nCr p^r q^n-r
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OpenStudy (anonymous):
sorry, i have no idea how to do it that way...
OpenStudy (anonymous):
its okay haha thanks for helping anyway!
OpenStudy (anonymous):
your welcome :)
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