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Homework Help: A Basic Set Question

  1. Mar 30, 2006 #1
    In an examination 86 students out of 108 pass mathematics, 35 passed
    French and 3 failed both subjects. How many passed in both? Thanks guys.
     
  2. jcsd
  3. Mar 30, 2006 #2
    What are your ideas so far? Have you heard of the principle of inclusion-exclusion?
     
  4. Mar 30, 2006 #3

    Hurkyl

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    There are 4 cases. Look at the 4 cases.
     
  5. Mar 30, 2006 #4
    Draw a Venn diagram ;assume those who passed both to be x ;you should get x = 16.
     
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