Concept explainers
At a light bulb factory, 1728 light bulbs are ready to be packaged. A worker randomly pulls 60 light bulbs out and tests each one. Two light bulbs are found to be defective.
a. Based on the information given, what is your best estimate for the number of defective light bulbs among the 1728 light bulbs? Explain your reasoning.
b. If the light bulbs are put in boxes with 144 light bulbs in each box (in 12 packages of 12), then approximately how many defective light bulbs would you expect to find in a box? Explain your reasoning.
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