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Byju's Answer
Standard XII
Mathematics
Binomial Probability Theorem
Four dice are...
Question
Four dice are rolled. The number of possible out comes in which atleast one die shows
2
is
A
1296
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B
625
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C
615
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D
671
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Solution
The correct option is
B
671
The dice has
6
faces using the numbers
1
,
2
,
.
.
.
,
6
i.e., it has
6
possible out comes when four dices as r
olled, the
number of possible out comes
=
6
×
6
×
6
×
6
[product rule]
The number of possible out comes in which
2
does not appear on
any dice
=
5
4
(
2
is absent)
Hence, using the relation, atleast one
=
general
−
none
The number of possible out comes in which at least one dice shows
′
2
′
=
6
4
−
5
4
=
1296
−
625
=
671
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