Thursday
April 24, 2014

Homework Help: Maths

Posted by Amanda on Wednesday, March 3, 2010 at 9:24pm.

When Professor Sum was asked by Mr. Little how many students in his classes, he answered. “All of them study either languages, or not at all. One-half of them study languages only. One-fourth of them study French, one-seventh study physics only, and 20 do not study at all.” How many students does Professor Sum have?

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