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試卷名稱：107年 - 107 國立中山大學_碩士班招生考試_電機系(丙組)：離散數學#110222
年份：107年
科目：中山◆電機◆離散數學
16. A company gets graphics cards from two sources. The first source provides 40% of the cards, and the second source provides 60% of the cards. Past experience has shown that
of the cards from the first source are found to be defective, while 
of the cards from the second source are found to be defective. If a graphics cards is selected and found to be defective, what is the probability it was provided by the first source?
(A) 
(B)
(C) 
(D) 