Mark the correct alternative in the following question : Suppose … - Vidyadip

MCQ

Mark the correct alternative in the following question : Suppose a random variable $X$ follows the binomial distribution with parameters $n$ and $p,$ where $0 < p < 1$. If $\frac{\text{P(X = r})}{\text{P(X = n} -\text{r})}$ is independent of $n$ and $r,$ then $p$ equals:

✓
$\frac{1}{2}$
B
$\frac{1}{3}$
C
$\frac{1}{5}$
D
$\frac{1}{7}$

✓

Answer

Correct option: A.

$\frac{1}{2}$

$\frac{1}{2}$

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