Basically if q and m are not the same the this expression we will go to 0, and if they are the same, what you will get is basically you will get expected value of 1 by Q squared summation q equal to 0 through Q minus 1, x squared of Q y squared of Q x squared of Q become plus 1, y squared of Q becomes plus 1. So, this value becomes 1 by Q.
यदि q और m समान नहीं हैं, तो यह 0 हो जाएगा, और यदि q=m हैं, तो आपको मिलेगा। है और है। तो, यह मान हो जाता है।