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If a family has three children, what is the probability that
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23 Jan 2018, 15:16
23 Jan 2018, 15:16
1
Expert Reply
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Question Stats:
60% (00:50) correct
40% (00:58) wrong based on 40 sessions
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If a family has three children, what is the probability that the family has at least one girl?
1
0.875
0.75
0.50
0.375
Kudos for right answer and explanation
Re: If a family has three children, what is the probability that
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24 Jan 2018, 02:58
24 Jan 2018, 02:58
1
Total ways: 8
1-(Not a single girl)
1-1/8
7/8
0.87
1-(Not a single girl)
1-1/8
7/8
0.87
Re: If a family has three children, what is the probability that
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25 Jan 2018, 04:30
25 Jan 2018, 04:30
1
First, calculate ALL the possible constellations:
2*2*2 = 8 possible combinations.
Of the 8, only 1 combination includes NO girl (the question can also be thought of asking what the probability would be for the family to have NO girls at all and then subtract this probability from 1).
So the probability of at least 1 girl is 7/8 or 0.875 -> answer B
2*2*2 = 8 possible combinations.
Of the 8, only 1 combination includes NO girl (the question can also be thought of asking what the probability would be for the family to have NO girls at all and then subtract this probability from 1).
So the probability of at least 1 girl is 7/8 or 0.875 -> answer B
