Find arithmetic mean of x,x+1 and x+2 .

If f(x+y,x-y) =xy , then the arithmetic mean of f(x,y) and f(y,-x) is

Arithmetic mean of 1/2 & 1/3 is

The mean of x - 1, x and x + 1 is

p,x_(1), x_(2) ,. . . x_(n) and q, y_(1),y_(2), . . . ,y_(n) are two arithmetic progressions with common differences a and b respectively. If alpha and beta are the arithmetic means of x_(1), x_(2), . . . . X_(n), and y_(1), y_(2), . . . . Y_(n) respectivley . then the locus of p(alpha, beta) is

If the mean of a set of observations x_1 , x_2 ________ x_10 is 20. Find the mean of x_1 + 4, x_2 + 8, x_3 + 12,_________ x_10 +40.

If the mean of x_1, x_2, ....., x_n is barx then the mean of x_1/a,x_2/a, .... x_n/a is .......