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Byju's Answer
Standard XII
Mathematics
Permutation under Restriction
Different wor...
Question
Different words are being formed by arranging the letters of the word ARRANGE. All the words obtained are arranged in the form of a dictionary
The number of words in which no two A's are together
A
1260
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B
900
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C
360
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D
None of these
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Solution
The correct option is
B
900
Total number of words
=
Number of words in which particular things are always together + never together
∴
Number of words in which no two A's are together
=
Total words -Number of words in which A's are together
=
7
!
2
!
2
!
−
6
!
2
!
=
1260
−
360
=
900
∴
option
(
B
)
is correct.
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