The vast majority of "incurables" were killed in killing centres in Germany and weren't sent to camps. After all, the SS didn't want people arriving at camps in wheelchairs.
I was taught that over eleven million people were killed and six million were Jews. The other five million were other people like Handicaps and Gypsies. However I think that answers could easily very.
It depended on the camp, some were not as big as others. _____ There were huge variations in size. Some temporary satellite camps had numbers in the hundreds, while the largest camps sometimes had up...
Although the most notable method was poison gas a great many others were either shot, beaten, starved, burned, froze, died of untreated injuries/disease or worked to death.