[計量] 計量問題想請教板友
看板GRE (GRE入學考試)作者younes (Angel in Paris)時間15年前 (2010/09/15 17:45)推噓1(1推 0噓 0→)留言1則, 1人參與討論串1/2 (看更多)
1.If the assets of a certainmutuak fund dropped by 3.01 billion to 72.04
billion, what was the approximate decrease in the fund's assets?
答案是4%
可是我怎麼解都解不出來= =
2.If 55 percent of a group of people have brown hair and 80 percent of the
same group do not have red hair , what fraction of those who do not have
brown hair have red hair?
這題答案是4/9 , 不過我看了詳解還是不太懂
另外我想請問這題算是條件機率嗎? 還是只是單純的比而已
謝謝
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09/15 17:50, , 1F
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