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GRE數(shù)學(xué)考點(diǎn):Geometric Figures

時(shí)間:2019-03-15 11:50:00   來(lái)源:無(wú)憂考網(wǎng)     [字體: ]
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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.