From a lot of 30 bulbs which include 6 defectives, a sample of 4 bulbs is drawn at random with replacement. Find the probability distribution of the number of defective bulbs.

From a lot of 15 bulbs which include 5 defectives,a sample of 2 bulbs is drawn at random (without replacement).Find the probability distribution of the number of defective bulbs.

From a lot of 15 bulbs which include 5 defectives,a sample of 4 bulbs is drawn one by one with replacement.Find the probability distribution of number of defective bulbs. Hence find the mean of the distribution.

From a lot o f15bulbs which include 5 defective,a sample of 4 bulbs is drawn one by one with replacement.Find the probability distribution of number of defective bulbs. Hence,find the mean of the distribution.

From a lot of 10 bulbs,which includes 3 defectives,a sample of 2 bulbs is drawn at random.Find the probability distribution of the number of defective bulbs.

From a lot f10 bulbs,which includes 3 detectives,a sample of 2 bulbs is drawn at random.Find the probability distribution of the number of defective bulbs.

3defective bulbs are mixed up with 7 good 3 bulbs are drawn at random.Find the probability distribution of defective bulbs.

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

20% of the bulbs produced by a machine are defective. Find the probability distribution of the number of defective bulbs in a sample of 4 bulbs chosen at random.

A box contains 16 bulbs out of which 4 bulbs are defective. 3 bulbs are drawn one by one from the box without replacement. Find the probability that all three are defective bulbs

A lot of 20 bulbs contain 4 defective ones.One bulb is drawn at random from the lot.What is the probability that this bulb is defective?