Question 1210390
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100 coins are on a table showing 10 heads and 90 tails. You are blindfolded. 
Is it possible to divide the coins into 2 piles with an equal number of heads?
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Yes, of course - if you ask another person, who is sighted, to do it for you :)



Another way for a blindfolded person to perform this assignment on his or on her own 
is to select 5 head coins from the entire collection of 100 coins <U>by touch</U>.


In this case, you use your tactile senses instead of your sight.



To me, it remains unclear how this post and your question do relate to Math . . .