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2 distinct vertices of an octagon are chosen at random. What is the probability that they are opposite each other?

 Mar 31, 2021
 #1
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C(8, 2)    =  28

 

Only  4 pairs  are opposite

 

So

 

P   =    4  / 28   =    1/7

 

 

cool cool cool 

 Mar 31, 2021

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