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Jozrael · 09-24-2008, 08:19 PM

Quick question that's stumping me on the review material. I didn't pay much attention this day in class...now I'm paying for it xD.

2. In a class of 100 students, 35 studied French, 42 studied Spanish, 43 studied German, 17 studied French and Spanish, 15 studied Spanish and German, 13 studied French and German, and 20 did not study any of the three languages.

(a) Use a Venn-diagram and place appropriate numbers in each of the 8 regions.

(b) How many studied exactly two of three languages?

© How many studied French or German but not Spanish?

(d) How many studied Spanish only? (15points)

I figure I have to label all the areas as separate variables and add/subtract them in some series to get the variables I need, but I don't see a straightforward way to do that. Hints would be fine, just the answer is not cool if not accompanied by an explanation ^^. Looking to learn here, not have my homework done for me xD. Thanks!

09-24-2008, 08:19 PM	#1 (permalink)
Jozrael Junkie	Logic class Quick question that's stumping me on the review material. I didn't pay much attention this day in class...now I'm paying for it xD. 2. In a class of 100 students, 35 studied French, 42 studied Spanish, 43 studied German, 17 studied French and Spanish, 15 studied Spanish and German, 13 studied French and German, and 20 did not study any of the three languages. (a) Use a Venn-diagram and place appropriate numbers in each of the 8 regions. (b) How many studied exactly two of three languages? © How many studied French or German but not Spanish? (d) How many studied Spanish only? (15points) I figure I have to label all the areas as separate variables and add/subtract them in some series to get the variables I need, but I don't see a straightforward way to do that. Hints would be fine, just the answer is not cool if not accompanied by an explanation ^^. Looking to learn here, not have my homework done for me xD. Thanks!