37.3/6=0,50
38.A{(1,1)(1,2)(1,3)(1,4)(2,1)(2,2)(2,3)(3,1)(3,2)(4,1)}
n(A)=10
P(A)=10/36=5/18
39.0,8=8/10×500=400
40.0,7=7/10×30=21
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37.3/6=0,50
38.A{(1,1)(1,2)(1,3)(1,4)(2,1)(2,2)(2,3)(3,1)(3,2)(4,1)}
n(A)=10
P(A)=10/36=5/18
39.0,8=8/10×500=400
40.0,7=7/10×30=21