A quality control inspector is checking a sample of light bulbs. The table summarizes her results. If one of the light bulbs is selected at​ random, find the probability that the light bulb is good​, given that it is a 50 or 100 watt bulb. Wattage Good Defective Total 20 71 15 86 50 99 5 104 100 57 11 68 Total 227 31 258

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