（４）ないですがたぶん、
３枚ともバラバラ： 12/12 x 8/11 x 4/10 = 32/110
３枚とも一緒： 12/12 x 3/11 x 2/10 = 6/110
1-(32/110)-(6/110) = (110-36-6)/110 = 72/110 = 36/55 //
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