gre数学概率知识点|GRE数学重要知识点:GeometricFigures

副标题:GRE数学重要知识点:GeometricFigures

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  Geometric Figures


  If a point is selected at random inside a geometric figure, then the probability that the selected point lies inside a particular region is the ratio of their areas:


  area of the particular region inside the figure/area of the whole figure.


  Example:


  The probability that a randomly selected point within the square lies inside the circle=area of circle/area of square=∏r2/(4r2)= ∏/4.


  Remember:


  If the particular region is not completely inside the figure, then use only the area that is inside the figure.


GRE数学重要知识点:Geometric Figures.doc

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