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Sergeu [11.5K]
4 years ago
10

90% of the students in a high school have a cell phone. if there are 750 students in the school, how many of the students have c

ell phones
Mathematics
1 answer:
kaheart [24]4 years ago
8 0

Answer:

675

Step-by-step explanation:

750 gets turned into 7.50, or 7.5. Then you multiply 7.5 by 90 to get your answer

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Answer:

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Step-by-step explanation:

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n = \frac{z_{1-\alpha/2}^{2}p(1-p)}{E^{2} }

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How we don't know the value of p, we can estimate it like p = 0.5

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n = \frac{(2.33^{2})(0.5)(1-0.5)}{0.15^{2} }

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