can any one explain me the rules?

Hi, i am new to this show, and am not undestanding the grading system. And how did gaurav and Narayani got voted out?I am so sad to hear that😭😭😭 they were my favorites. I thought it was like half judges' votes and half people??😕 then wat is this participants' voting😕 i am sooooooooooo confused😆 Plz HELP😛😳