Question

a box of 600 electric bulbs contain 12 defective bulbs one bulb is taken out at random from this box what is the probability that it is a non defective bulb

Answer 1

it is 1/600 per one time it we have 12 chance then it is 12/7200
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Answer 2

hi mate ,
no of bulbs in the box = 600
no of bulbs defected = 12
no of non defective bulbs = 600-12
=588
so the probability is 1/588