164. The working lifetime, in years, of a particular model of bread maker is normally distributed with mean 10 and variance 4.
Calculate the 12th percentile of the working lifetime, in years.
(A) 5.30
(B) 7.65
(C) 8.41
(D) 12.35
(E) 14.70
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1. 題目解析 本題要求計算一種特定型...