Question
A box contains `14` black socks and `14` white socks. Apart from color, all socks in the box are identical. Danny wants to take a pair of socks from the box without looking inside. How many socks does he need to take out to:
A. Certainly have any pair of socks,
B. Certainly have a pair of black socks?
Difficulty level (1 very easy - 10 very hard): 2
Topics:
Combinatorics
->
Pigeonhole Principle
Combinatorics
->
Case Analysis / Checking Cases
->
Processes / Procedures
讘谞讬诪讬谉 诪专讝讜谉 - 4 years ago
讗. 15
讘. 16
eva tv - 3 years ago
讗. 3
讘. 16
注讚讬 讚诪专讬 - 5 years ago