`y={(ax+b):agt0},x={x:1lexle17}` Mean and Variance of y are 17 and 216 . Find a and b

Let X = {x in N : 1 le x le 17 } and Y ={ax + b : x in X and a,b, in R , a > 0} . If mean and variance of elements of Y are 17 and 216 respectively then a + b is equal to

Let A=[x in Z^(+):1 =0 . If mean of set B is 25 and variance of set B is 208, then find a+2b .

The equation of line is 5x-2y=17 Mean deviation of y about mean is 5. Calculate the mean deviation of x about mean

If the tangent to the curve y=x^(3)+ax+b at (1,6) is parallel to the line x-y+5=0 , find a and b

If 5x-2y = 17 and 3x +y =8 , then find the values of x and y .

3 point O (0,0),P(a,a^2),Q(-b,b^2)(agt0,bgt0) are on the parabola y=x^2 . Let S_(1) be the area bounded by the line PQ and parabola let S_2 be the area of the Delta OPQ , the minimum value of S_(1)//S_(2) is

Let PQ be a focal chord of the parabola y^(2)=4ax such that tangents at P and Q meet at point on the line y=2x+a, agt0, If PQ subtends an angle theta at the vertex of y^(2)=4ax , then tan theta =