Question about Canon Ink/PFI-300 10ink Multi

Hello
It obviously depends on the format.
For example 30x40 I would say about twenty, about
10x15 about a hundred

These are Canon's standard ink cartridges for this printer. Canon specifications for number of prints: https://de.canon.ch/printers...

This will depend on the format, the type of image and the frequency with which you print (the more often you print, the more prints you can make, due to the cleaning of the print nozzles). On average, 25 A4 prints. And not all cartridges empty at the same rate, for the same reasons as mentioned above.