Q41 of 46 Page 278

Fill in the blanks

If is the mean of n values of x, then is always equal to _______.


If a has any value other than , then is _________ than.

zero, less than

Explanation: given is mean of n values, then the sum of all n terms is denoted by , so difference of both these is always equal to zero, i.e.,



And square of the above equation is also equal to zero, so



Now if f ‘a’ has the value other than , then



So,



So, if a has any value other than , then is less than.


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