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A factory produces bulbs. The probability that any one bulb is defective is 1/50 and they are packed in boxes of 10.

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A factory produces bulbs. The probability that any one bulb is defective is 1/50 and they are packed in boxes of 10. From a single box, find the probability that (i) none of the bulbs is defective (ii) exactly two bulbs are defective (iii) more than 8 bulbs work properly Select the correct answer from above options

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Let X is the random variable which denotes that a bulb is defective. (iii)More than 8 bulbs work properly i.e., there is less than 2 bulbs which are defective. So, r<2 r = 0,1 ∴P(X=r) =P(r<2) =P (0) +P (1)

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