Find the value of ?
`3 , 2 =7`
`5 , 4 =23`
`7 , 6 = 47`
`9 , 8 = 79`
`10 , 9 = ?`

Find the value of : 11-9+5-6-3+7

Find the median of : 16, 9, 11, 23, 7, 5, 12, 14, 8, 10, 21

Find the value of the determinant . [[5,3],[7,9]]

Find the mode of (i) 7, 7, 8, 10, 10, 11,13, 14 (ii) 4, 5, 6, 7, 8, 7, 6, 5, 3, 4, 6, 7, 6

Find the median of 7,6,5,3,9,4,3.

Find the mode of the following data: (i) 3, 5, 7, 4, 5, 3, 5, 6, 8, 9, 5, 3, 5, 3, 6, 9, 7, 4 (ii) 3, 3, 7, 4, 5, 3, 5, 6, 8, 9, 5, 3, 5, 3, 6, 9, 7, 4 (iii) 15, 8, 26, 25, 24, 15, 18, 20, 24, 15, 19, 15

If different values of variable x are 9.8, 5.4 , 3.7 , 1.7 , 1.8 , 2.6 , 2.8 , 10.5 and 11.1 , find the mean barx

Find the standard deviation for the following data: (i) x : , 3, 8, 13, 18, 23 f: , 7, 10, 15, 10, 6 (ii) x : , 2, 3, 4, 5, 6, 7, 7 f: , 4, 9, 16, 14, 11, 6, 6

If different values of variable x are 9.8, 5.4 , 3.7 , 1.7 , 1.8 , 2.6 , 2.8 , 10.5 and 11.1 , find the value of sum(x - barx)

Find the value of x if: a. x, 7,9, 21 are in proportion. b. 6, 15, 8, x are in proportion.