Hi tarun!
well, the number varies depending upon what you print. An image will certainly consume more ink than text but at an average, a usual black toner for canon laserbase MF6530 printer should yield 5000 pages approximately.
You can check details here:
http://www.printcountry.com/original_new_canon_cartridge_106_ 0264b001aa_black_toner_cartridge-cartridges/CN-L-ZOE-0264B001AA.h tm
Avi

