問題詳情
58. 假設英語成績成常態分配，平均數為 
，標準差 
，學校決定英語成績表現在百分等級 90 以上者，可進一步選修高階英語課程。若欲選修高階英語課程，英語成績至少需要幾分？（提示： 
） 
，標準差 ，學校決定英語成績表現在百分等級 90 以上者，可進一步選修高階英語課程。若欲選修高階英語課程，英語成績至少需要幾分？（提示： ）
參考答案
答案：B
難度：適中0.490938
統計：A(151),B(2140),C(1304),D(764),E(0)
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