will i get my lost paid apps on my ipad?

[sparky]

i'm a new user to apple ipad2, my college gave it with 3 paid apps..(pages, numbers,& keynotes)..i downloaded new itunes and got apple id from my friend and synced with my ipad to it....and all of a sudden everything got deleted and its with oly the pre-installed apps oly..mine runs on IOS-6

how shud i get it back..

pls help ppl...thnx