A) \[\frac{5}{11}\]
B) \[\frac{21}{55}\]
C) \[\frac{4}{11}\]
D) None of these
Correct Answer: B
Solution :
Required probability \[=\frac{{}^{7}{{C}_{2}}}{{}^{11}{{C}_{2}}}=\frac{7\,\,.\,\,6}{11\,\,.\,\,10}=\frac{21}{55}.\]
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