(单选题)17: 设E为掷一颗骰子,以X表示出现的点数,则随机变量X的概率分布为( )
A: P{X=n}=1/6, (n=1,2,3,4,5,6)
B: P{X=n}=n/6 (n=1,2,3,4,5,6)
C: P{X=n}=(n-1)/6 (n=1,2,3,4,5.6)
D: P{X=n}=1-n/6 (n=1,2,3,4,5,6)
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