Question 1122072
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3 divided by 2 is 1.5.  Divide the number of boys by the number of girls in each given scenario.  If you get 1.5, then it could be an accurate description of the actual class.  If you get a different number, then it is not an accurate description.  Be careful with the last three:  you have to calculate the number of boys or girls by subtracting from the number of students.
								
								
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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