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Sahay Sir > Question Answers > NCERT Class 9 > Maths > Chapter 14 - Statistics > 15. Let x be the mean of x1, x2, … , xn and y the mean of y1, y2, … , yn. If z is the mean of x1, x2, … , xn, y1, y2, … , yn, then z is equal to

15. Let x be the mean of x1, x2, … , xn and y the mean of y1, y2, … , yn. If z is the mean of x1, x2, … , xn, y1, y2, … , yn, then z is equal to

... 15. Let x be the mean of x1 then z is equal to x+2 xn xn and y the mean of y1 y1) y2) yn yn. If z is the mean of x1