Question: Sally, a quality control inspector, is checking a sample of lightbulbs for defects. The following table summarizes her findings. If one of these lightbulbs is

Sally, a quality control inspector, is checking a sample of lightbulbs for defects. The following table summarizes her findings.

Good Defective Total Wattage 20 80 15 95 50 100 105 100 120 10 130 Total 300 30 330

If one of these lightbulbs is selected at random, determine the probability that the lightbulb is.


Good.


Good Defective Total Wattage 20 80 15 95 50 100 105 100 120 10 130 Total 300 30 330

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