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NDA 2013
Exam
NDA
Year
2013
Subject
Mathematics
Chapter
Permutation and Combination

NDA 2013 · Mathematics · Permutation and Combination

In how many ways can the letters of the word 'GLOOMY' be arranged...

In how many ways can the letters of the word 'GLOOMY' be arranged so that the two O's should not be together?

Options

  1. A240240
  2. B480480
  3. C600600
  4. D720720

Correct answer

A. 240240

Step-by-step solution

......... GLMY 004×5C2=240\begin{aligned} &......... \text{ GLMY } 00 \\ & 4 \times{ }^5 \mathrm{C}_2=240\end{aligned}
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