Question 1160023
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To solve the problem, I will assume that 10 pairs of B-shoes are different (distinguishable), as well as 12 pairs of L-shoes, too.



<pre>
    Actually, <U>the problem</U>, had it be formulated correctly, should say it directly, openly and explicitly,

    without my deciphering/remaindering.


    But since the problem is worded UNPROFESSIONALLY,  {{{highlight(I)}}}  forced to do it, instead of the composer to this problem.
</pre>


In the worst case, you will pick up 10 + 12 = 22 unpaired shoes;


but the next, 23-rd shoe will give you a pair, inevitably.


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Solved.


For many other similar solved problems, see the lesson

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

in this site.