Problem

Evaluate \( { }_{9} P_{3} \)

Answer

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Answer

\( { }_{9} P_{3} = 9 \times 8 \times 7 \)

Steps

Step 1 ：\( { }_{9} P_{3} = \frac{9!}{(9 - 3)!} \)

Step 2 ：\( { }_{9} P_{3} = \frac{9!}{6!} \)

Step 3 ：\( { }_{9} P_{3} = 9 \times 8 \times 7 \)

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