if the sum of deviation of a set n values X1, X2, X3,.......................Xn measured from 50 and 46 and -10 and 70 respectively,then the mean is
if the sum of deviation of a set n values X1, X2, X3,.......................Xn measured from 50 and 46 and -10 and 70 respectively,then the mean is
if the sum of deviation of a set n values X1, X2, X3,.......................Xn measured from 50 and 46 and -10 and 70 respectively,then the mean is