Question

it is known that a box containing 600 electric bulbs contains 12 defective bulb is taken out at random from this box . what is the probability that it is a non defective bulb

Answer 1

total bulbs in box = 600

defected bulbs = 12

non defected bulbs = 588

probably = no. of observation / total no. of observation

probability of non defected bulbs = 588/600

therefore probability = 49/50

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