There are two boxes. Box A contains 6 red balls, and 4 blue balls and Box B contains 4 red balls and 8 blue balls. A die is rolled, if the number is less than 3, a ball is selected from box A. If the result is 3 or more, a ball is selected from Box B. Calculate: a. The probability that the ball will be red and selected from Box B. b. The probability that the ball will be blue.

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Q: find the probability that a house owner owns none of them.

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A: It is an important part of statistics. It is widely used.

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