1. Sep 19, 2013 #1

   Miike012

   

   How would I go about solving this?
   We are starting to learn about venn diagrams so would creating a venn diagram be helpful?
   
   This is what I tried so far, I created a set C consisting of all people who have taken calculus and a set D consisting of all people who have taken discrete math.
   
   |C| = 331
   |D| = 217
   and
   |C^D| = 199.
   
   How can I determine the value of |C or D|?
   
   |C^D| = number of people who have taken D and C
   
   |C or D| = number of people who have taken D or C.

    

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   Miike012, Sep 19, 2013
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3. Sep 19, 2013 #2

   Dick

   

   Science Advisor

   Homework Helper

   Creating a Venn diagram would be very helpful. There's an inclusion-exclusion identity connecting all of those numbers. |C or D|=|C|+|D|-|C and D|. The diagram should make it obvious.

    

   Dick, Sep 19, 2013
4. Sep 19, 2013 #3

   Evo

   

   Staff: Mentor

   Miike, please do not delete the homework template, you must type everything out, attaching files in lieu of typing out the information is not allowed. It's also very inconsiderate to expect members to read something as hard to read as what you posted. I have typed it out above.
   
   Helpers, please remember to report any thread where the template is not used and/or is not properly filled out.
   
   Thanks!

    

   Last edited: Sep 19, 2013

   Evo, Sep 19, 2013

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