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Earlier discussion
2 older comments kept for context.
Sulaimon Mariam opeyemi
Please Sir how do u get ur final answer.
I can seem to understand it.
Doctor Strange
MATHEMATICIAN = 13 letters with 2M, 3A, 2T, 2I.
Hence, the word MATHEMATICIAN can be arranged in \(\frac{13!}{2! 3! 2! 2!}\)
= 129729600 ways