A) \[\frac{1}{84}\]
B) \[\frac{1}{21}\]
C) \[\frac{5}{84}\]
D) None of these
Correct Answer: C
Solution :
Total number of ways in which 3 balls can be drawn are \[{}^{9}{{C}_{3}}=84.\] Since the drawn balls can?t be of red colour, as these are 2 in numbers. Therefore favourable number of ways \[={}^{3}{{C}_{3}}+{}^{4}{{C}_{3}}.\] Hence the required probability \[=\frac{5}{84}.\]
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