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SMO 2024 Open Round 1 Question 24

SMO · SMO 2024 Open Round 1

Question 24

Let $n$ denote the number of ways of arranging all the letters of the word MATHEMATICS in one row such that

- both M’s precede both T’s; and
- neither the two M’s nor the two T’s are next to each other.

Determine the value of $\dfrac n{6!}$.