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February 27, 2015

February 27, 2015

Posted by **dan** on Thursday, April 15, 2010 at 3:09pm.

“All of them study either languages, physics, or not at all. One-half of them study languages only,

one-fourth of them study French, one-seventh of them study physics only, and 20 do not study at

all.” How many students does Professor Sum have?

- Brain Teaser -
**Frenchy**, Saturday, April 17, 2010 at 5:39amProfessor Sum has 56 students.

28 of then study languages - one half

(14 of which study French)

8 study physics - one-seventh

20 do not study at all.

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