How much is one cartridge of ink expected to last? -

I have a lexmark color cartridge how many black and white sheets is it expected to last for

Typically 300 pages is a good estimate

well you don t use much color ink on a black and white page so practically and infinite ammount. of course by then the cartridge will dry out and the printer will be broken.

Are you a racist? Why does it matter how long the blacks live compared to coloured? I hope you are ashamed of yourself! :-( Racist scum!

That depends on how much you print documents.