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Byju's Answer
Standard XII
Mathematics
Permutation: n Different Things Taken All at a Time When All Are Not Different.
How many ways...
Question
How many ways the letters of the word
′
A
R
M
O
U
R
′
can be arranged?
A
720
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B
300
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C
360
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D
350
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Solution
The correct option is
C
360
ARMOUR
Number of letters
=
6
R
′
s
⟶
2
Number of ways of arranging
=
6
!
2
!
=
6
×
5
×
4
×
3
=
12
×
30
=
360
Therefore number of ways of arranging
=
360
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Permutation: n Different Things Taken All at a Time When All Are Not Different.
Standard XII Mathematics
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