Question

out of 400 bulbs in a box ,15 bulbs are defective one bulbe is taken out random .find the probability the bulb is non defective

Answer 1

Hi friend
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Your answer
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Number of bulbs = 400

Number of defective bulbs = 15

Number of non detective bulbs = 400 - 15 = 385

Then,
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Probability of taking out a non detective bulb = 385/400 = 0.9625


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