NDA 2024 Mathematics question
Urn contains 2 white and 2 black balls while urn contains 3 white and 2 black balls. One ball is transferred from urn to urn and then a ball is drawn out of urn . What is the probability that the ball is white?
Answer: (B)
Solution
The transferred ball is white with probability (then has 4 white, 2 black) and black with probability (then
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