There are 12 red balls and 11 blue balls in a bowl. Without looking at the balls, a woman chooses them at random. How many balls must she choose to ensure that she has at least four balls of the same color? 1.1. There are 12 red balls and 11 blue balls in a bowl. Without glancing at the balls, a woman chooses them at random. How many balls must she choose to ensure that she has at least three blue 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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Apply the pigeonhole principle.

1. There are 12 red balls and 11 blue balls in a bowl. Without looking at the balls, a woman chooses them at random. How many balls must she choose to ensure that she has at least four balls of the same color?

1.1. There are 12 red balls and 11 blue balls in a bowl. Without glancing at the balls, a woman chooses them at random. How many balls must she choose to ensure that she has at least three blue balls?

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