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討論串[計量] 請教一題印度機經
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Let (x+10) denote number of students learning both Spanish and French. (y+10) denote number of students learning both Spanish and Russian. (50-x-y+10)
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Given total number of students as 120 &. Number of students learning Spanish = 40. Number of students learning French = 60. Number of students learnin
(還有105個字)
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