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06 Aug 2007, 10:19
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N
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
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What is the probability of bearing two boys from four born babies?
(A) 1/5
(B) 1/8
(C) 1/2
(D) 3/8
(E) 6/11
(A) 1/5
(B) 1/8
(C) 1/2
(D) 3/8
(E) 6/11
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06 Aug 2007, 10:38
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I believe it goes like this:
total number of outcomes = 2*2*2*2 = 16
total number of outcomes with 2 Boys = 4 choose 2 = 4! / (2!*2!) = 6
answer is 6/16=3/8 (choice D)
Hope this helps!
total number of outcomes = 2*2*2*2 = 16
total number of outcomes with 2 Boys = 4 choose 2 = 4! / (2!*2!) = 6
answer is 6/16=3/8 (choice D)
Hope this helps!
