This math topic focuses on calculating the number of distinct ways to order letter tiles, with at least one repeated letter. The problems require the use of factorial equations to determine permutations considering repetitions. Each problem presents multiple choices which include different factorial expressions for students to evaluate, thereby reinforcing their understanding of factorial concepts and permutation calculations within probability and statistics. This topic is beneficial for practicing skills in probability distributions and combinations.
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How many distinct ways can these letter tiles be ordered? Show as a factorial.