Question

Evaluate __________.
A. 9
B. 362,880
C. 126
D. 3,024

Answer 1

\[_9P_4\]?

Answer 2

Yes!!!

Answer 3

count out four places and multiply
\[9\times 8\times 7\times 6\]

Answer 4

\[_nP_k= \frac{n!}{(n-p)!}\]

Answer 5

What do u mean count out 4 places

Answer 6

i mean start with \(9\)

Answer 7

3,024?

Answer 8

then times 8, times 7, times 6
use 4 numbers

Answer 9

yes

Answer 10

\[_9P_4= \frac{9!}{(9-4)!}\]\[=\frac{9!}{5!}\]\[=\frac{9\times8\times7\times6\times5!}{5!}\]\[=9\times8\times7\times6\]

Answer 11

@UnkleRhaukus wrote the formula, but imho you should not use it as written
the number after the P tells you how many numbers you are going to multiply together

Answer 12

so for example
\[_{10}P_3=10\times 9\times 8\]

Answer 13

Okay. thank you.