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NDA 2013
Exam
NDA
Year
2013
Subject
Mathematics
Chapter
Probability

NDA 2013 · Mathematics · Probability

A bag contains 5 black and 3 white balls. Two balls are drawn at...

A bag contains 5 black and 3 white balls. Two balls are drawn at random one after the other without replacement. What is the probability that both are white?

Options

  1. A1/281 / 28
  2. B1/141 / 14
  3. C3/283 / 28
  4. DNone of the above

Correct answer

C. 3/283 / 28

Step-by-step solution

3C28C2=328\frac{{ }^3 \mathrm{C}_2}{{ }^8 \mathrm{C}_2}=\frac{3}{28}
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