From a shipment of 400 light-bulbs, a sample of 80 was selected at random and tested. If 32 light-bulbs in the sample were found
to be defective, how many defective light-bulbs would be expected in the entire shipment?
1 answer:
80 x 5 = 400
32 x 5 = 160
so you have about 160 <span>defective bulbs</span>
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