Question 1129474
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The outcome can be one of two ways for the first flip and for each of those ways two ways for the second flip for a total of four outcomes for two flips.  Then for each of those ways, two ways for the third flip....and so on:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 2^7]
								
								
John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
<img src="http://c0rk.blogs.com/gr0undzer0/darwin-fish.jpg">
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  
								
{{n}\choose{r}}
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