SOLUTION: A libraian finds that in one day, 344 people check out nonfiction books, 687 check out fiction books and 245 check out both fiction & nonfiction books. How many people checked out

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Question 178981This question is from textbook Mathematical Excursions
: A libraian finds that in one day, 344 people check out nonfiction books, 687 check out fiction books and 245 check out both fiction & nonfiction books. How many people checked out fiction or non fiction on that day? This question is from textbook Mathematical Excursions

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A libraian finds that in one day, 344 people check out nonfiction books, 687 check out fiction books and 245 check out both fiction & nonfiction books. How many people checked out fiction or non fiction on that day?
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(# fiction or non-fiction) = (# fiction) + (# non-fiction)-(#fict and non-fict)
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(# fict or non-fict)= 687 + 344 - 245 = 786
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Cheers,
Stan H.