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August 30, 2015

Homework Help: math

Posted by brian on Friday, November 20, 2009 at 4:55pm.

Lead Contamination More than a decade ago high levels of lead in the blood put 88% of children at risk. A concerted effort was made to remove lead from the environment.
In a random sample of 200 children taken more than a decade ago, what is the probability that 50 or more had high blood-lead levels?

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