Permutation: n Different Things Taken All at a Time When All Are Not Different.
All the permu...
Question
All the permutations of the letters of the word AGAIN are arranged as in dictionary, then the fiftieth word is
A
NAAIG
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B
AANIG
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C
IGNAA
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D
GANIA
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Solution
The correct option is DNAAIG Number of words starting with A = 4!=24 Starting with G = 12 Starting with I = 12 12+12+12+12=48 NAAGI is 49th word NAAIG is 50th word of dictionary Hence, option 'A' is correct.