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质量控制，缺陷率 2\% 。 P(50 样本 0 缺陷) 。（答： 0,98^(50) approximately equals 0,364 。）
质量控制，缺陷率 2\% 。 P(50 样本 0 缺陷) 。（答： 0,98^(50) approximately equals 0,364 。）
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