24. An urn contains b blue balls and r red balls. They are removed at random and not replaced. Show that the probability that the first red ball drawn is the (k+ 1)th ball drawn equals (+b-k-¹)/(+b). r-1 Find the probability that the last ball drawn is red.
24. An urn contains b blue balls and r red balls. They are removed at random and not replaced. Show that the probability that the first red ball drawn is the (k+ 1)th ball drawn equals (+b-k-¹)/(+b). r-1 Find the probability that the last ball drawn is red.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:24. An urn contains b blue balls and r red balls. They are removed at random and not replaced. Show
that the probability that the first red ball drawn is the (k + 1)th ball drawn equals (+b-k-¹)/(r+b).
Find the probability that the last ball drawn is red.
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