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:
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$\frac{1}{7}$