Two bad eggs are accidentally mixed with 10 good ones. 3 eggs are drawn at random with replacement from this lot.
i. Compute mean for the number of bad eggs drawn.
ii. Hence calculate variance and standard deviation .

From the following frequency distribution (i) Find mean. (ii) Calculate variance and standard deviation.

Four defective oranges are accidentally mixed with sixteen good ones . Two oranges are drawn at random from the mixed lot. If the random variable X denotes the number of defective oranges then find the values of X and number of points in its iverse image.

Four defective oranges are accidentally mixed with sixteen good ones. Two oranges are drawn at random from the mixed lot. If the random variable 'X' denotes the number of defective oranges, then find the values of 'X' and number of points in its inverse image.

Two cards are drawn with replacement from a well shufflied deck of 52 cards . Find the mean and variance for the number of aces .

Two cards are drawn without replacement from a wellshuffled deck of 52 cards. Let X be the number of face cards drawn, then the sum of mean and variance of X will be.

There are 30 white balls and 10 red balls in bag. 16 balls are drawn with replacement from the bag. If X be the number of white balls drawn then the value of (mean(X))/(standard deviation(X)) is equal to (A) 4sqrt3 (B) 2sqrt3 (C) 3sqrt3 (D) 3sqrt2

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 of the number of defective bulbs if 3 bulbs are drawn at random.

Ten eggs are drawn successively with replacement from a lot containing 10% defective eggs. Find the· probability that there is atleast one defective egg.

Ten eggs are drawn successively with replacement from a lot containing 10% defective eggs. Find the probability that there is at least one defective egg.