Question 1165569
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Since this is a baby doing the picking, there is no guarantee that s/he will pick only one of the notes if they are all in the same pocket, so the possibilities are


5, 20, 50, 5 & 20, 20 & 50, 5 & 50, or 5 & 20 & 50.


Seven different ways, four of which have a 20 in them, so 4/7.

																
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">


I > Ø
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  
								
{{n}\choose{r}}
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