List of top Mathematics Questions on Mean asked in CUET (UG)

The function \[ f(x)=\sum_{k=1}^{7}(x-k)^2 \] has a minimum value at \(x=a\). Then, \(a\) is equal to:

If the mean of 5 observations x, x+2, x+4, x+6 and x+8 is 11, then value of x