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Byju's Answer
Standard XII
Mathematics
Axiomatic Approach
A die is thro...
Question
A die is thrown
7
times.
What is the chance that an odd number turns up at least
4
times?
A
1
3
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B
1
4
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C
1
2
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D
35
128
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Solution
The correct option is
C
1
2
For at least
4
successive odd number,
Probability
=
7
C
4
(
1
2
)
4
(
1
2
)
3
+
7
C
5
(
1
2
)
5
(
1
2
)
2
+
7
C
6
(
1
2
)
6
(
1
2
)
1
+
7
C
7
(
1
2
)
7
=
1
2
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