Five defective mangoes are accidentally mixed with 15 good ones. Four mangoes are drawn at random from this lot. Find the probability distribution of the number of defective mangoes.

Five defective mangoes are accidenty mixed with 15 good ones. Four mangoes are drawn at random from this lot. Then the probabilty distribution of the number of defective mangoes is

Five defective bolts are accidently mixed with twenty good ones.If four bolts are drawn at random from this lot,find the probability distribution of the number of defective bolts.

Four defective oranges are accidently mixed with sixteen good ones and by looking at them it is not possible to differentiate between them. Three oranges are drawn at random from the lot. Find the probability distribution of X, the number of defective oranges.

Five bad oranges are accidently mixed with 20 good ones.If four oranges are drawn one by one successively with replacement,then find the probability distribution of number of bad oranges drawn.Hence find the mean and variance of the distribution.

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

Two bad eggs are accidently mixed up with ten good ones.Three eggs are drawn at random with replacement from this lot.compute the mean for the number of bad eggs drawn.

Five defective bulbs are accidentally mixed with 20 good ones. It is not possible to just look at a bulb and tell whether or not it is defective. Find the probability distribution if four bulbs are drawn from this lot.

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 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.