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Properties of inequalities

If X follows ...

Question

If X follows binomial distribution with parameters n,p with $n = 5, p (x = 2) = 9 = p (x = 3),$ then p=

1/2

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1/4

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1/3

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2/3

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Solution

The correct option is A
1/2

p(x=2)=p(x=3)=9 $\Rightarrow p = q = \frac{1}{2}$

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