How to remove a password from a PDF?

Its one of my exam past papers and I wanted to edit some pages to loosen the amount of paper needed to print with. It has a pass set by the exam board so I can't seem to edit it.

Thanks

 

Try going to File>Print then select the page number you want to print. Or go to each page and click "Print Current Page"

 

That is do-able but Im too lazy to do it for about 20 exam papers.
I just want to be able to edit it using nitro pdf then remove the un-needed pages. This way I can pop them onto my usb and have done when im back into school.

Thank

 

Wrong section / double thread.