Case 1:  There are 0 Ken(s) without Barbie.
Case 2:  There are 1 Ken(s) without Barbie.
Case 3:  There are 49 Ken(s) without Barbie.
Case 4:  There are 39 Ken(s) without Barbie.
Case 5:  There are 43 Ken(s) without Barbie.
Case 6:  There are 49 Ken(s) without Barbie.
Case 7:  There are 0 Ken(s) without Barbie.
Case 8:  There are 0 Ken(s) without Barbie.
Case 9:  There are 5 Ken(s) without Barbie.
Case 10:  There are 5 Ken(s) without Barbie.