An urn contains 10 white and 3 black balls. Another urn contains 3 white and 5 black balls. Two balls are transferred from first urn and placed in the second and then one ball is taken from the latter. What is the probability that it is a white ball?
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$U_1$ contains 10 white balls and 3 black balls. Total balls in $U_1$ are 13. $U_2$ contains 3 white balls and 5 black balls. Total balls in $U_2$ are 8. Show more…
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