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April 16, 2014

Homework Help: algebra 1

Posted by alex on Sunday, September 18, 2011 at 5:22pm.

From a shipment of 350 light-bulbs, a sample of 70 was selected at random and tested. If 21 light-bulbs in the sample were found to be defective, how many defective light-bulbs would be expected in the entire shipment?

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