SETTLING NORTH AMERICA 1497 1732
NORTH AMERICAN SETTLEMENTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Mrs. Morgan’s children are
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4 boys
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2 boys and 2 girls
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3 girls and 1 boy
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3 boys and 1 girl
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Explanation:
Detailed explanation-1: -If you ask “for any family with two children, what are the chances that they have one boy and one girl” the answer is 50% (and a 25% there are two boys and 25% that there are two girls).
Detailed explanation-2: -boys which = 3/8 + 3/8 + 1/8 = 7/8.
Detailed explanation-3: -First, since the chance of a child being a girl is 1/2, the chance of all three being girls is (1/2) (1/2) (1/2) = 1/8. Alternatively, make a list of all possible outcomes, in order of age: GGG, GGB, GBG, BGG, GBB, BGB, BBG, BBB. As each one is equally likely, the chance of GGG is again 1/8.
Detailed explanation-4: -Hence, the probability that all the three children are boys is n(S)n(E)=81.
There is 1 question to complete.