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LikeIke7105
06.02.2022 •
Mathematics
According to a 2012 report, 68.5 % of all US adults still have a landline telephone service for which they pay. Given the rise of cell phone use, an employee for a local telephone company is interested in seeing if this percentage has decreased. A random sample of 449 US adults is selected from 2014 driver's license records. Each person sampled is asked if still have a landline telephone service for which they pay.
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Ответ:
Equation: 9 = 1/3x
Multiply by three on both sides and you get: 27 = x