Problem 10 of 7
Count permutations of distinct objects for arrange 7 distinct musical instruments.
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use factorial or multiplication principle.
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Use permutations when order matters and objects are distinct.
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Solution
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1. Decide that order matters.
2. List decreasing choices for each position.
3. Multiply or use permutation notation.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Combination counts when positions or order matter.