A) 0
B) \[\frac{3}{10}\]
C) \[\frac{7}{10}\]
D) \[\frac{10}{10}\]
Correct Answer: D
Solution :
Required probability \[=\frac{{}^{3}{{C}_{1}}+{}^{7}{{C}_{1}}}{{}^{10}{{C}_{1}}}=\frac{10}{10}\].
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