I m trying to increase my site's page rank, here is my question, if i got 1000 pr 5 backlinks and 20 pr 7 link and around 50 backlink from pr 6 and all are do follow . then how much pr i can expect for my website? mostly all backlinks are from different domains. Otherwise backlinks are around 10000 in total included pages without pr
it depends on how many OTHER links those pages linking to you have on them. A link from a PR4 page can actually pass you more PR than a link from a PR5 page if the PR5 page has a lot more links on it. But I'd suspect you'd end up around PR4-5. But it's totally a guess.
How old is the site ? How many out bound links are on the site you got your links from ? what is its current pr ?
each pages hardly have 10 to 20 and few pages have only my link as outbound link (pr6,7,4,5) i didn't linked any page to my site. my domain is around 1 year old.
Are you sure the exact page where the link is located is PR5, PR6, PR7 or is the home page for the site where the link is located PR5, PR6, PR7? PR is assigned at the page level (it's not a site level attribute like domain age) so just because a home page has a PR of 7 does not mean getting a link from any page on that site is considered a PR7 link...
It depends on the QUALITY of inbound links that you are getting. The more quality of inbound links, the higher chances for your site to get high PR value.
remember that from all high pagerank page you can get 85% of pagerank divided by number of other links on that site
Check out this table. It has a pretty good estimation of how the page ranking goes depending on your backlinks. Bear in mind that the number of links on each backlinking page can have a large effect on these numbers: http://www.amapanet.com/how-many-backlinks-need-to-get-certain-pagerank.html