8. Find the minimum number of students needed to guarantee that 4 of them: (a) have last names which begin with the same first letter; (b) were born on the same day of a month (with 31 days).

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.2: Arithmetic Sequences
Problem 52E
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8. Find the minimum number of students needed to guarantee that 4 of them:
(a) have last names which begin with the same first letter;
(b) were born on the same day of a month (with 31 days).
Transcribed Image Text:8. Find the minimum number of students needed to guarantee that 4 of them: (a) have last names which begin with the same first letter; (b) were born on the same day of a month (with 31 days).
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