Find the variance and S.D. for the following set of numbers. : 7, 11, 2, 4, 9, 6, 3, 7, 11, 2, 5, 8, 3, 6, 8, 8, 2, 6

Choose the coorect altertnative answer for each of the following question: If A = {1, 2, 4, 6, 8, 11, 13} , B ( 3, 4, 7, 11, 13), find A cap B .

A digit is selected at random from either of the two sets {1, 2, 3, 4, 5, 6, 7, 8, 9} and {1, 2, 3, 4, 5, 6, 7, 8, 9}. What is the chance that the sum of the digits selected is 1 0?

A digit is selected at random from either of the two sets {1, 2, 3, 4, 5, 6, 7, 8, 9} and {1, 2, 3, 4, 5, 6, 7, 8, 9}. What is the chance that the sum of the digits selected is 10?

Find if sum to infinity of the following arithmetic geometric sequence. 1, -3/2, 5/4, -7/8, 9/16, -11/32 , ……