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in how many ways can you place 9 different books on a shelf if there is a space for only 4 books?​

Sagot :

Answer:

3024 ways

Step-by-step explanation:

[tex]P(9,4) = \frac{9!}{(9 - 4)!} \\ = \frac{9 \times 8 \times 7 \times 6 \times5!}{5!} \\ = 9 \times 8 \times 7 \times 6 \\ = 3024[/tex]