1.

There are 4 cards numbered 1,3,5 and 7.one number on one card.Two cards are drawn at random without replacement.Let X denote the sum of the numbers on the two drawn cards.Find the mean and variance of X.

Answer»

There are 4 cards numbered 1,3,5 and 7.one number on one card.Two cards are drawn at random without replacement.Let X denote the sum of the numbers on the two drawn cards.Find the mean and variance of X.



Discussion

No Comment Found