SOLUTION: Molly needs to get at least an 80% on her test. How many questions can she afford to miss without going below 80%?

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Question 548317: Molly needs to get at least an 80% on her test. How many questions can she afford to miss without going below 80%?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
How many questions are there?