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設取出的兩個數分別為x、y,可得0<x<1且0<y<1,滿足條件的點(x,y)所在的區域為橫縱坐標都在(0,1)之間的正方形內部,即如圖的正方形OABC的內部,其面積為S=1×1=1,若兩數之和小於65,即x+y<65,對應的區…
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