1.If the standard deviation of the numbers −1,0,1,k-1, 0, 1, k−1,0,1,k is 5\sqrt{5}5, where k>0k > 0k>0, then kkk is equal to:a.6\sqrt{6}6b.45\sqrt{\frac{4}{5}}54c.25\sqrt{\frac{2}{5}}52d.262\sqrt{6}26Login to continueOnly logged in users canattempt or see the solution.
