# There are 5 items defective in a sample of 30 items.find the probability that an item chosen at random from the sample is 1.defective,2.non defective .

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Probability of defective is 5/30=1/6

probability of non defective is 25/30=5/6.

probability of non defective is 25/30=5/6.

probablity of defective=5/30 =>1/5

non defective=30-5=>25

Probablity of non defective=25/30=>5/6