SOLUTION: Mother made 15 cookies. There are 10 cookies with raisins and 10 cookies with nuts. How many cookies have both cookies and nuts?

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Question 1010632: Mother made 15 cookies. There are 10 cookies with raisins and 10 cookies with nuts. How many cookies have both cookies and nuts?
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
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10 + 10 - 15 = 20 - 15 = 5.

For details, see the lesson Counting elements in sub-sets of a given finite set in this site.