阿摩線上測驗
題組內容
2.[20%] A manufacturer produces steel rods in three sizes (small, medium and large). For the steel rods sold
by this manufacturer, 50% are of small size, 40% are of mediu
ium size and 10% are of large size. Based on
the strength test results, 15% of the small steel rods do not meet the specification. The pe ercentages that do
not meet the specification are 10% and 5% for medium and large steel rods, respectively.
(ii) (10%) If a rod randomly chosen from this manufacturer does not meet the specification, what is the probability that this rod is of medium size?
詳解 (共 1 筆)
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詳解 #6090165