Suppose the bulb drawn ina lot of 20 bulbs contain 5 defective bulbs one bulb is drawn at random find the probability of
(a) the bulb is not defective
(b) suppose the bulb is not defective and not replacement ;then find the probability that the next bulb which is drawn is defective
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Answer:
total number of bulbs =20
no. of defective bulbs =5
therefore no. of good bulbs =15
a) probability that the bulb is not defective is=15\20=3\4
b) probability that the bulb is defective is =5\20=1\4
Step-by-step explanation:
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