Question 1127322
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*[tex \Large n] is the total number sold that day.


*[tex \Large x] is the number sold that actually had tinted lenses.


*[tex \Large p] is the probability that any given pair will have tinted lenses.


So the probability of the given occurrence is:



*[tex \LARGE \ \ \ \ \ \ \ \ \ \ P(40,6,0.05)\ =\ {{40}\choose{6}}(0.05)^6\cdot(0.95)^{34}]

								
								
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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