Alcohol risk

The 2009 Youth Risk Behavior Survey found that about 5 out of 12 high school students drank some amount of alcohol in the 30 days preceding the survey. If a high school has 2400 students, how many would be expected to have used alcohol within a 30-day period?

Correct result:

x =  1000

Solution:

$x={\displaystyle \frac{5}{12}}\cdot 2400=1000$

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