Out of 400 bulbs in a box, 15 bulbs are defective. One bulb is taken a – InterviewSolution

1.	Out of 400 bulbs in a box, 15 bulbs are defective. One bulb is taken at random from the box. Find the probability that the bulb is not defective.
Answer» Total NUMBER of outcomes (i.e. number of bulbs) = 400Number of DEFECTIVE bulbs = 15Therefore, number of non-defective bulbs = 400 - 15 = 385Probability = Possible outcomes / Total outcomes= 385 / 400 = 77/80 = 96.25%

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