Hi
Question is a part of exercise of Prepswift video, “Permutation with repetitions”
The question is conspicuously asking number of distinct possibilities with no 2 Bipoghraphies or Novels being aside to each other", which Greg has answered in the solution “There is only 1 possibility.” Still, he calculated 144 outcomes (which are the total possible outcomes) to be the final answer.
Isnt it a mistaken answer? Isnt the answer 1?