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NDA 2013
Exam
NDA
Year
2013
Subject
Mathematics
Chapter
Probability

NDA 2013 · Mathematics · Probability

Two numbers are successively drawn from the set U=\...

Two numbers are successively drawn from the set U={1,2,3,4,5,6,7,8}\mathrm{U}=\{1,2,3,4,5,6,7,8\}, the second being drawn without replacing the first. The number of elementary events in the sample is

Options

  1. A6464
  2. B5656
  3. C3232
  4. D1414

Correct answer

B. 5656

Step-by-step solution

5C2×2!=56{ }^5 \mathrm{C}_2 \times 2!=56
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