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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 .



Probability of defective is 5/30=1/6
probability of non defective is 25/30=5/6.
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is there any detailed steps or formula
probablity of defective=5/30 =>1/5
 non defective=30-5=>25
Probablity of non defective=25/30=>5/6
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