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Standard XII
Mathematics
Random Experiment
Different wor...
Question
Different words being formed by arranging the letters of the word "INTERMEDIATE". All the words obtained are written in the form of a dictionary,
The number of arrangements in which vowels & consonants occur alternatively are
A
43300
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B
43200
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C
21600
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D
None of these
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Solution
The correct option is
B
43200
There are 6 vowels and 6 consonants.
Thus, to occur alternately, the series may start with a consonant OR a vowel i.e. there are
2
cases.
The vowels may be arranged in
6
!
2
!
3
!
ways (since we have I 2 times and E 3 times)
The consonants many be arranged in
6
!
2
!
ways (since we have T 2 times)
Thus, total arrangements
=
6
!
6
!
2
!
3
!
2
!
×
2
=
43200
Hence, (B) is correct.
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