A) \[1-{{(19/20)}^{5}}\]
B) \[{{(19/20)}^{5}}\]
C) \[{{(3/4)}^{5}}\]
D) \[90\,{{(1/4)}^{5}}\]
Correct Answer: B
Solution :
[b] Here p=19/20, q=1/20, n=5, r=5. The required probability is \[^{5}{{C}_{5}}{{\left( \frac{19}{20} \right)}^{5}}{{\left( \frac{1}{20} \right)}^{0}}={{\left( \frac{19}{20} \right)}^{5}}\]
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