Question 517963: Suppose that the genders of the three children of a family are soon to be revealed. An outcome is represented by a string of the sort GBB (meaning the oldest child is a girl, the second oldest is a boy, and the youngest is a boy). The outcomes are listed in the table below. Note that each outcome has the same probability.
For each of the three events in the table, check the outcome(s) that are contained in the event. Then, in the last column, enter the probability of the event.
Event: A boy on the 2nd birth
Event: Exactly one girl
Event: Two or more girls
Outcome grid includes: BGB, GGG, BBG, GBB, BBB, BGG, GBG, GGB
And probability for each event?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! For each of the three events in the table, check the outcome(s) that are contained in the event. Then, in the last column, enter the probability of the event.
Event: A boy on the 2nd birth:: BBG,GBB,BBB,GBG ;;;Prob = 4/8 = 1/2
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Event: Exactly one girl::GBB,BGB,BBG::: Prob = 3/8
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Event: Two or more girls:::GGG,GGB,GBG,BGG::: Prob = 3/8
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Outcome grid includes: BGB, GGG, BBG, GBB, BBB, BGG, GBG, GGB
And probability for each event?
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Cheers,
stan H.
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