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NDA 2012
Exam
NDA
Year
2012
Subject
Mathematics
Chapter
Probability

NDA 2012 · Mathematics · Probability

What is the most probably number of successes in 10 trials with...

What is the most probably number of successes in 10 trials with probability of success 2/32 / 3 ?

Options

  1. A10
  2. B7
  3. C5
  4. D4

Correct answer

B. 7

Step-by-step solution

p(r)=nCr⋅pr⋅qn−rn=10,p=2/3,q=1/3\begin{aligned} & p(r)={ }^n \mathrm{C}_r \cdot p^r \cdot q^{n-r} \\ & n=10, p=2 / 3, q=1 / 3\end{aligned}
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