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UPSC NDA I 2014 Mathematics Paper
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© examsnet.com
Question : 18
Total: 120
Out of 7 consonants and 4 vowels, words are to be formed by involving 3 consonants and 2 vowels. The number of such words formed is :
[NDA I 2014]
25200
22500
10080
5040
Validate
Solution:
The number of words
=
7
C
3
×
4
C
2
×
5
!
=
25200
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