The probability that a student is not a swimmer is 1/5. What is the probability that out of 5 students, 4 are swimmers [DCE 1999]

\[{{\left( \frac{4}{5} \right)}^{4}}\frac{1}{5}\]

\[{}^{5}{{C}_{4}}{{\left( \frac{4}{5} \right)}^{4}}\frac{1}{5}\]

\[{}^{5}{{C}_{1}}\frac{1}{5}{{\left( \frac{4}{5} \right)}^{4}}\times {}^{5}{{C}_{4}}\]

The probability that a student is not a swimmer is 1/5. What is the pr

1.	The probability that a student is not a swimmer is 1/5. What is the probability that out of 5 students, 4 are swimmers [DCE 1999]
A.	\[{}^{5}{{C}_{4}}{{\left( \frac{4}{5} \right)}^{4}}\frac{1}{5}\]
B.	\[{{\left( \frac{4}{5} \right)}^{4}}\frac{1}{5}\]
C.	\[{}^{5}{{C}_{1}}\frac{1}{5}{{\left( \frac{4}{5} \right)}^{4}}\times {}^{5}{{C}_{4}}\]
D.	None of these
Answer» B. \[{{\left( \frac{4}{5} \right)}^{4}}\frac{1}{5}\]

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The probability that a student is not a swimmer is 1/5. What is the probability that out of 5 students, 4 are swimmers [DCE 1999]

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