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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
A bag contains $6$ red and $4$ green balls.
A fair die is rolled and a number of balls equal to that appearing on the die is chosen from the bag at random.
The probability that all the balls selected are red is
Solution
Required probability $=\dfrac16\sum_{k=1}^6\dfrac{\binom6k}{\binom{10}k}$ Evaluating gives $\dfrac18$ Answer: $\boxed{\dfrac18}$Online Test Series, Information About Examination,
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