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13-01-2017
Mathematics

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Delsym middle school has 1,800 students. A random simple of 80 shows that 24 have cell phones. Predict the number of students in the school who have cell phones

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13-01-2017

Cross multiply and set it up like this.

1800 X
------- • -------
80 24

Multiply 1800•24
Then divide by 80 and you get 540.

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