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OpenStudy (anonymous):

question is attached, answerer(s) get medals

OpenStudy (anonymous):

there is nothing attached...

OpenStudy (anonymous):

crap my mistake

OpenStudy (anonymous):

Shaded part is circle in a square, assume radius r = half side of square. Required probability is (4r^2- pi r^2)/4r^2 = 1- (pi/4), about 20%.

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