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25 May 2018, 04:24
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
74% (01:06) correct
26%
(01:22)
wrong
based on 171
sessions
History
Date
Time
Result
Not Attempted Yet
If a family has three children, what is the probability that the family has at least one girl?
A. 1
B. 0.875
C. 0.75
D. 0.50
E. 0.375
A. 1
B. 0.875
C. 0.75
D. 0.50
E. 0.375
25 May 2018, 05:03
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Bunuel
The probability that all three children are boys is 0.5*0.5*0.5 = 0.125
The probability that the family has at least one girl is 1-0.125 = 0.875
Hence Option B = 0.875 is the answer.
25 May 2018, 05:44
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Probability of having at least one girl =1- Prob of all boys
Prob of having all boys =0.5*0.5*0.5
Answer =1-0.125=0.875 "B"
Prob of having all boys =0.5*0.5*0.5
Answer =1-0.125=0.875 "B"
