Discrete Mathematics We want to spread a face-to-face exam among 24 students over three days: Wednesday, Thursday and Friday. An exam schedule is the score with the 3 subsets of students for each day. (Or, equivalently, a function e: {1,2,...,24}→{M, J,V}.) We want to count the possible schedules (=N) under different rules. 3. Suppose we have to cancel the exam on Friday and everyone has to take the test on Wednesday or Thursday. What is the number of schedules possible? Answer: N=? Hint : Answer is not 12

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