Question

We have two urns: Urn A contains 6 red balls and 4 white balls, Urn B...

We have two urns: Urn A contains 6 red balls and 4 white balls, Urn B contains 4 red balls and 8 white balls. A die is rolled, if a number less than 3 appears; we go to box A; if the result is 3 or more, we go to ballot box B. Then we extract a ball. It is requested:
to. Probability that the ball is red and ballot box B.
b. Probability that the ball is white.

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