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Byju's Answer
Standard IX
Mathematics
Probability
Four die are ...
Question
Four die are rolled. The number of ways in which at least one die shows
2
is
A
546
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B
671
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C
625
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D
1256
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Solution
The correct option is
B
671
Number of dice rolled
=
4
Each dice has outcome
=
6
Total number of outcome of
4
dice
⇒
(
6
)
4
⇒
6
×
6
×
6
×
6
⇒
1296
Atleast one two so
Total outcome - number of two as a outcome
Number of outcome possible if two doesnt occur
=
5
on and dice
⇒
(
5
)
4
⇒
5
×
5
×
5
×
5
⇒
625
Outcome possible when atleast one
2
is possible
⇒
(
6
)
4
−
(
5
)
4
⇒
1296
−
625
⇒
671
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