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Problem 43166. Probabilities - Balls and urns - 02

The urn contains B blue balls and R red balls. Each trial consists of drawing one random ball from the urn and observing its color. Then the ball is discarded.

What is the probability that, after N trials, the number of red balls is K?

Solution Stats

91.67% Correct | 8.33% Incorrect
Last Solution submitted on Feb 11, 2019

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