Answer:
There are 31 days in October, so there are 31 - 15 = 16 days left in October after October 15.
16 days is equivalent to 2 weeks and 2 days (since there are 7 days in a week), so November 11 is 2 weeks and 2 days after October 15.
Therefore, November 11 falls on a Wednesday + 2 weeks + 2 days = Friday.
So November 11 of that same year falls on a Friday.