The probability that a student is not a swimmer is $1/5$. What is the probability that $4$ out of $5$ students are swimmers?
- A$^5C_4 \left( \frac{4}{5} \right)^4 \left( \frac{1}{5} \right)$
- B$\left( \frac{4}{5} \right)^4 \left( \frac{1}{5} \right)$
- C$^5C_1 \left( \frac{1}{5} \right) \left( \frac{4}{5} \right)^4 \times ^5C_4$
- DNone of these
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