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OpenStudy (selena2345):
In a test,41 of 720 light bulbs burn out before their advertised life of 700 hours. What percent of bulbs fail to last the advertised life ?
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OpenStudy (kropot72):
Number of bulbs tested = 720 Number of bulbs that failed = 41 Percentage failure is found from \[\frac{41}{720}\times 100=you\ can\ calculate\]
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