Rearrangements of LOLLIPOP with matching ends
Question
Count the distinct arrangements of the eight letters of the word LOLLIPOP whose first and last letters are the same. (For example, LOLIPOPL qualifies.)
Short answer
. LOLLIPOP has three L, two O, two P and one I. With L at both ends the middle six letters (L, O, O, P, P, I) can be arranged in ways. With O at both ends, or P at both ends, there are ways each. I cannot be at both ends, so the total is .
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Open the worked solutionLessons behind this question
- Counting and Combinatorics
- Conditional Probability, Total Probability, and Bayes' Rule
- Worked Examples — Probability Trees, Monty Hall, and Bayesian Updating
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