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A lot of 20 bulbs contain 4 defective bulbs. One bulb is drawn at random from the lot, what is the probability that this bulb is defective? |
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Answer» Total defective bulbs in the lot = 4 Total number of bulbs in the lot = 20. Now probability that drawn bulb is defective = \(\frac{Total \,defective\,bulbs\,in\, the\, lot}{Total\, number\, of\, bulbs\,in\, the\, lot} = \frac{4}{20} = \frac{1}{5}\) Hence, the probability that drawn bulb is defective is \(\frac{1}{5}\) |
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