Find the mean number of defective items in a sample of two items drawn one-by-one without replacement from an urn containing 6 items, which include 2 defective items. Assume that the items are identical in shape and size.

From a lot of 10 items containing 3 defectives, a sample of 4 items is drawn at random without replacement. The expected number of defective items is

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?

There are 6% defective items in a large bulk of item.Find the probability that sample of 8 items will include not more than one defective items.

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.

There are 4 defective items in a lot consisting of 10 items.From this lot we select 5 items at random.The probability that there will be 2 defective items among them is

In the items produced by a factory there are 10% defective items A sample of 6 items is randomly chosen . Find the probability that this sample contains (i) exactly 2 defective items (ii) not more than 2 defective items (iii) at least 3 defective items .

From a lot of 10 items containing 3 defective items a sample of 4 items is 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 : (i) The Probability Distribution of X (ii) Mean of X (iii) Variance of X.

There are 5% defective items in a large bulk of items.What is the probability that a sample of 10 items will include not more than one defective item?

A machine manufactures some items in a day of which 5% are defective. 10 items are checked one by one with replacement. Find the probability that there is atleast on defective item.