1. Selecting ____ cards from a deck of cards guarantees that nine cards are of the same suit. 2. In a group of 21 people, there is a ____ chance that at least two of them has shaken hands with the same number of people.

1. Selecting cards from a deck of cards guarantees that nine cards are of the same suit. 2. In a group of 21 people, there is a chance that at least two of them has shaken hands with the same number of people.

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter10: Sequences, Series, And Probability

Section10.8: Probability

Problem 59E

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Using the pigeonhole principle

1. Selecting ____ cards from a deck of cards guarantees that nine cards are of the same suit.

2. In a group of 21 people, there is a ____ chance that at least two of them has shaken hands with the same number of people.

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