How many wins I need in placements to get high silver low gold?

I know it depends and stuff, but just to have an idea, how many wins/losses and in what order, I need to get silver 1/Gold 5 from my placements. This is a new account never played ranked before, I won my first game and was matched vs full gold 3-2 because I duo with a gold 2 friend. So I am going to assume that now when I will launch my MMR will be around gold. Has anyone here got gold from placements after the first time playing ranked on a new account ? If yes what was your score ?
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