Question 1164430
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The answer to the first question is  3 songs.


Among any 3 songs from the given set, at least two INEVITABLY will be of the same genre.




The answer to the second question is 30 songs.


It is because in the worst case I will be forced to listen 29 R&B songs, in a row.



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&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/misc/In-the-worst-case.lesson>In the worst case</A> 


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