Free GMAT Practice Question

Question 1 of 1
ID: GMAT-PS-029
Section: Quantitative Reasoning - Problem Solving (PS)
Topic: Combinatorics
Difficulty level: Medium

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How many secret-codes are possible taking all five symbols $ \unrhd , \Box , \otimes , \oslash ,$ and $\Diamond$ such that no code should have a $\unrhd$ at the beginning and a $\oslash$ at the end?

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