I was faced with the problem, that I don't think has a solution. Whether someone can confirm my guesses or prove otherwise.
Following problem :
Joe and Tony take a vacation at Summer camp. During the vacation, they both either played tennis in the evening or practiced Yoga in the morning, ensuring that they do not undertake both the activities on any single day. There were some days when they did nothing. Out of the days that they stayed at the camp, they involved in one of the two activities on 22 days. However, their counselor while sending an end of vacation report to their parents stated that they did not do anything on 24 mornings and they did nothing on 12 evenings. How long was their vacation?
A) 36 days B) 14 days C) 19 days D) Cannot be determined E) 29 days