What is the probability that there will be exactly 4 red balls among the chosen balls? b. Given that there are at least 3 red balls among the chosen balls, what is the probability that there are exactly 4 red balls?

What is the probability that there will be exactly 4 red balls among the chosen balls? b. Given that there are at least 3 red balls among the chosen balls, what is the probability that there are exactly 4 red balls?

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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Question

An urn consists of 20 red balls and 30 green balls. We choose 10 balls at random from the urn. The sampling is done without replacement (repetition not allowed). a. What is the probability that there will be exactly 4 red balls among the chosen balls? b. Given that there are at least 3 red balls among the chosen balls, what is the probability that there are exactly 4 red balls?

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