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JEE Main Math Class 12 Probability Part 1 Questions
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© examsnet.com
Question : 11
Total: 100
A die is thrown two times and the sum of the scores appearing on the die is observed to be a multiple of 4. Then the conditional probability that the score 4 has appeared atleast once is :
[Sep. 03, 2020 (I)]
1
4
1
3
1
8
1
9
Validate
Solution:
E
1
[the event for getting score a multiple of 4 ]
=
(
1
,
3
)
,
(
3
,
1
)
,
(
2
,
2
)
,
(
2
,
6
)
,
(
6
,
2
)
,
(
3
,
5
)
,
(
5
,
3
)
,
(
4
,
4
)
&
(
6
,
6
)
E
2
[
4
has appeared atleast once
]
=
(
1
,
4
)
,
(
2
,
4
)
,
(
3
,
4
)
,
(
4
,
4
)
,
(
5
,
4
)
,
(
6
,
4
)
,
(
4
,
1
)
,
(
4
,
2
)
,
(
4
,
3
)
(4,5)
&
(
4
,
6
)
E
1
∩
E
2
=
(
4
,
4
)
P
(
E
2
E
1
)
=
1
9
© examsnet.com
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