What is the chance of getting at least one defective item if 3 items are drawn randomlyfrom a lot containing 6 items of which 2 are defective item?

A lot has 10% defective items .10 items are chosen randomly from the lot the probability that exactly 2 of the chosen items are defective

A sample of 2 itmes is selected at random from a bag containing 5 items of which 2 are defective. Then mean of number of defective items is

Three items from a lot of 10 items are defective. if two items are selected randomly one by one without replacing then the probability that both are defective items.

A lot contains 15 items of which 5 are defective. If three items are drawn at random, find the probability that (i) all three are defective

A lot contains 15 items of which 5 are defective. If three items are drawn at random, find the probability that none of the three is defective. Do this problem directly.

From a log of 6 items containing 2 defective items, a sample of 4 items are drawn at random. Let the random variable X denote the number of defective items in the sample. If the sample is drawn without replacement, find : (a) The probability distribution of X. (b) Mean of X. (c ) Variance of X.