A) \[\frac{12\times {{5}^{3}}}{{{7}^{5}}}\]
B) \[\frac{10\times {{6}^{2}}}{{{7}^{5}}}\]
C) \[\frac{2}{5}\]
D) \[\frac{10\times {{6}^{3}}}{{{7}^{5}}}\]
E) \[1\]
Correct Answer: D
Solution :
Required probability\[{{=}^{5}}{{C}_{2}}{{\left( \frac{1}{7} \right)}^{2}}{{\left( \frac{6}{7} \right)}^{3}}\] \[=\frac{10\times {{6}^{3}}}{{{7}^{5}}}\]
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