If `x_1, x_2, ,\ x_n` are `n` values of a variable `X\ a n d\ y_1, y_2, ......,yn` are `n` values of variable `Y` such that `y_i=a x_i+b , i=1,2,\...., n` then write `Va r\ (Y)` in terms of `Va r(X)`

Let x_1, x_2, ...... ,x_n be values taken by a variable Xa n dy_1, y_2,.......... ,y_n be the values taken by a variable Y such that y_i=a x_i+b ,i=1,2, ,ndot Then, (a) V a r(Y)=a^2V a r(X) (b) V a r(X)=a^2V a r(Y) (c) V a r(X)=V a r(X)+b (d) none of these

Let x_1, x_2, ...... ,x_n be values taken by a variable X a n d y_1, y_2,.......... ,y_n be the values taken by a variable Y such that y_i=a x_i+b ,i=1,2,3.... Then, (a) Var.(Y)= a^2Var.(X) (b) Var.(X)=a^2Var.(Y) (c) Var.(X)=Var.(X)+b (d) none of these

If x1, x2, x3,....xn are n values of a variable X such that Find the value of n and the mean.

If x_1,x_2,.......,x_n are n values of a variable X such that sum_(i=1)^n (x_i-2)=110 and sum_(i=1)^n(x_i-5) =20 . Find the value of n and the mean.

If x+y=4\ a n d\ x y=2, find the values of x^2+y^2

If x_(1), x_(2), ………,x_(n) are n values of a variable x such that sum(x_(i)-3) = 170 and sum(x_(i)-6) = 50. Find the value of n and the mean of n values.

If x-y=7\ a n d\ x y=9, find the value of x^2+y^2

Find the real values of x\ a n d\ y ,\ if:(1+i)(x+i y)=2-5i

Find the real values of x\ a n d\ y ,\ if:(x+i y)(2-3i)=4+i

If x_1, x_2, .....x_n are n observations such that sum_(i=1)^n (x_i)^2=400 and sum_(i=1)^n x_i=100 then possible values of n among the following is