Question 972697
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No. *[tex \Large {{80}\choose{3}}] is correct because that is choosing 3 out of 80 regardless of order AND without replacement.  The only way you get a zero area triangle is if two or three of the chosen points are the same point, which is to say that the selection is made WITH replacement. 


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it

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