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A man has 68 socks his drawer: 35 identical blue, 20 identical black and 13 identical red. The lights are out and he is completely in the dark. How many socks must he take out to make 100% certain he has at least one pair of black socks?

A man has 68 socks his drawer: 35 identical blue, 20 identical black and 13 identical red. The lights are out and he is completely in the dark. How many socks must he take out to make 100% certain he has at least one pair of black socks?

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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78 9 A man has 68 socks his drawer: 35 identical blue, 20 identical black and 13 identical red. The lights are out and he is completely in the dark. How many socks must he take out to make 100% certain he has at least one pair of black socks? 318
Transcribed Image Text:78 9 A man has 68 socks his drawer: 35 identical blue, 20 identical black and 13 identical red. The lights are out and he is completely in the dark. How many socks must he take out to make 100% certain he has at least one pair of black socks? 318
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