Hi there everyone. I want to ask u that. If my domain is ranked 3 and recieves good traffic. Then will my subdomain also recieve good traffic?And i know that the subdomain will have no rank. Sorry for my bad english and thanx in advance.

You should IMO consider you domain and your subdomain as separate entities when it comes to search engines. Your subdomain can rank as good or better than your main domain and the pages in the subdomain get PR just the same as anyother pages.

Right Mel. Totally separate pages. You will need to promote or optimize both to achieve the same results.

Both will be considered as different you should do seperate work for both of them.

Hope it helps