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Byju's Answer
Standard XII
Mathematics
Permutation under Restriction
How many word...
Question
How many words can be formed with the letters of the word
′
O
M
E
G
A
′
when vowels being never together?
A
12
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B
36
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C
24
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D
84
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Solution
The correct option is
C
84
OMEGA
Treat the vowels
O
,
E
,
A
as single entity.
Number of ways when vowels are together
3
!
×
3
!
=
36
Total ways for arranging letters of omega
=
5
!
=
120
Words when vowels will not be together
=
120
−
36
=
84
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