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Mathematics 7 Online
OpenStudy (anonymous):

you survey 200 people about electronics they own. the results show that 33 over 40 people own a cell phone. Of these people, 10 over 11 also own an mp3 player. A. What fraction of the people own a cell phone and an mp3 player? B. How many people own a cell phone, but not an mp3 player? Explain?

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