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Byju's Answer
Standard XII
Mathematics
Union of Sets
A couple has ...
Question
A couple has two children, one of which is a boy. What is the probability that they have two boys?
A
1
2
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B
2
3
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C
1
3
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D
None of these
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Solution
The correct option is
C
1
3
The sample space is (and needs to be) {BB,BG,GB,GG}.
,
We know one child is a boys, so that rules out GG.
the probability that they have two boys
P
(
E
)
=
1
3
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