Venn diagram question - please help

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30 in a class 20 studying French 15 studying German and 3 studying neither. How many are studying both?

Posted Tue 19th February, 2013 @ 18:13 by Isabella

2 Answers

  • 1 vote

30-3=27 so 27 are studying a language 20+15=35 35-27=8

Answered Wed 20th February, 2013 @ 19:46 by Hoosierette
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The answer is 8, but that was figured out through trial and error. I need a method...can anyone help? I don't see this in my notes.

Answered Tue 19th February, 2013 @ 18:43 by Isabella