X服从参数为1的泊松分布,则有()
A.P{∣X-1∣≥ε}≥1-1/ε2(ε﹥0)
B.P{∣X-1∣≥ε}≤1-1/ε2(ε﹥0)
C.P{∣X-1∣﹤ε}≥1-1/ε2(ε﹥0)
D.P{∣X-1∣﹤ε}≤1/ε2(ε﹥0)
正确答案是C
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