An urn contains 7 red and 4.white balls. Two balls are drawn in succession without replacement. If the second ball is white, what is the probability thatthe first ball was white?Probability =(Type a fraction. Simplify your answer.)

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Answered: An urn contains 7 red and 4.white…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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An urn contains 7 red and 4.white balls. Two balls are drawn in succession without replacement. If the second ball is white, what is the probability that the first ball was white? ..... Probability = (Type a fraction. Simplify your answer.)