Let the five observations are `1, 3, 8, x, y` and their mean is `5` and variance is `9.2` find the value of `x/y` (a) `9:4` (b) `6:7` (c) `5:8` (d) none

The mean of 5 observations 1,2,6,x and y is 4.4 and their variance is 8.24 , then x+y is

If the mean of the following distribution is 2.6, then the value of y is Variable (x) : 1 2 3 4 5 Frequency (y) : 4 5 y 1 2 (a) 3 (b) 8 (c) 13 (d) 24

The means of five observations is 4 and their variance is 5.2. If three of these observations are 1,2 and 6, then the other two are 2 and 9 (b) 3 and 8 4 and 7 (d) 5 and 6

Find the value of (-9/5 +( -8/5 ) ÷ 5/2 times (-5/4 ) ) (a) -1 (b) -3 (c) 2 (d) -8

If 7x + 3y + 9 = 0 and y = kx + 7 are two parallel lines then find the value of k. (a)9/7 (b)-7/3 (c)5/8 (d)6/5

If (x+y)=3 , x y=2 , then what is the value of x^3+y^3 ? (a) 6 (b) 7 (c) 8 (d) 9 (e) None of these

The mean of 5 observations is 5 and their variance is 124. If three of the observationsare 1,2 and 6, then the mean deviation from the mean of the data is (1)2.4 (b) 2.8 (c) 2.5 (d) 2.6

The mean of five observations is 5 and their variance is 9.20. If three of the given five observations are 1,3 and 8, then a ratio of other two observations is

Mean and variance of 7 observation 2,4,10,12,14,x,y are 8 and 16 respectively. find xy is

If 3 x + 4y - 11= 18 and 8x - 6y + 12 = 6 , then what is the value of 5x - 3y - 9 ?