Question 8Given the set of $n$ numbers, $n\gt1,$ of which one is $1-\dfrac1n$ and all the others are $1.$ The arithmetic mean of the $n$ numbers is:$1$$n-\dfrac1n$$n-\dfrac1{n^2}$$1-\dfrac1{n^2}$$1-\dfrac1n-\dfrac1{n^2}$