Ranked games

Hi Riot Games

I have a question about the ranked games... Why is it possible for exampel me coming together with a UNRANKED player when im GOLD??????? I really dont understand how i have a chance to win and how this bad unranked player have a chance to play against plat and gold..

Tell me, i really need to understand how it ts even possible coming together with a unranked, i dont see why you place a unranked with a gold, give no sence and just a free lose for my team and me and free win for enemy. Fix it, PLEASE