NDA 2015
- Exam
- NDA
- Year
- 2015
- Subject
- Mathematics
- Chapter
- Permutation and Combination
NDA 2015 · Mathematics · Permutation and Combination
If different words are formed with all the letters of the word...
If different words are formed with all the letters of the word 'AGAIN' and are arranged alphabetically among themselves as in a dictionary, the word at the 50th place will be
Options
- ANAAGI
- BNAAIG
- CIAAGN
- DIAANG
Correct answer
B. NAAIG
Step-by-step solution
First two words (according to dictionary)no. of words formAA ---3!=6AG---3!=6AI---3!=6AN ---3!=6GA---3!=6GI---3!/ 2!=3GN ---3!/ 2!=3IA---3!=6IG ---3!/ 2!=3IN---3!/ 2!=3NA---3!=6
it means word will be starting with ' '.