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OpenStudy (anonymous):
A cell phone company found that 15 of their phones sold in June were defective. The company sold 250 phones in June. How many of the 300 phones sold in July should they expect to be defective?
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OpenStudy (zzr0ck3r):
so we are thinking about ratios, we want the ratio to be the same for june and july. 15/250 = x/300 does this help?
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