⑴1/2×1/2+1/3×2/3×2=25/36
⑵同得0分的概率为1/2×1/2×1/3×1/3=1/36,同得2分的概率1/2×1/2×2×2/3×1/3×2=1/18,同得4分的概率为1/2×1/2×2/3×2/3=1/9所以得分相同的概率为1/36+1/18+1/9=7/36
⑴1/2×1/2+1/3×2/3×2=25/36
⑵同得0分的概率为1/2×1/2×1/3×1/3=1/36,同得2分的概率1/2×1/2×2×2/3×1/3×2=1/18,同得4分的概率为1/2×1/2×2/3×2/3=1/9所以得分相同的概率为1/36+1/18+1/9=7/36