[機經] Math jj 203
203. 78% student was graduated from the school in 1980.
89% students graduated from the school in 1980.
問滿足兩個條件的學生比例。（為nonpanicfan版本的第13題）
這種題目的經典解釋是：肉包子中a%是有摺的，有摺包子中b%是肉包子，
實際上隱含的關係就是肉包子有摺的=有摺的肉包子，都是同一批包子
（1980年畢業生的數目是一樣的）..忘記是哪位NN在哪個月提出來的..拜服一下
變體題目（或者說本身就是原題）：
The sentence "students was graduated from high school"
is accepted by 89% of the students, and the sentence
''students graduated from high school '' is accepted
by 78% of the students. 問兩個同時被accept的概率。70%
這題該怎麼解？...
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