TS EAMCET · Maths · Probability
An urn contains five balls. Two balls are drawn at random and they are found to be white. The probability that all the balls in the urn are white, is
- A \(\frac{1}{2}\)
- B \(\frac{3}{8}\)
- C \(\frac{2}{5}\)
- D \(\frac{2}{3}\)
Answer & Solution
Correct Answer
(A) \(\frac{1}{2}\)
Step-by-step Solution
Detailed explanation
Let \(A_i(i=1,2,3,4)\) be the event that the urn contains 2, 3, 4 or 5 white ball and the event that two white ball are drawn. We have to find \(P\left(A_4 / B\right)\) Since the four events \(A_1, A_2, A_3, A_4\) are equally likely, we have…
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