Question

Find the value of each expression.

Answer 1

\[_{9} P _{3}\]

Answer 2

did you find the answer to your question?

Answer 3

i did. is it 60480?

Answer 4

@blurbendy

Answer 5

I got 504

9P3 = nPr = (n!) / (n-r)!

Answer 6

i was told it was 9!/3! ?

Answer 7

that's wrong, it's (n-r)! on the bottom

Answer 8

okay so its 362,880 on top and 362,880 - 6 on the bottom?

Answer 9

first top part is right, bottom should be
(9 - 3)!
=
6!

Answer 10

im a little confused.

Answer 11

about what

Answer 12

i dont get how your getting 504. i can get out of the thousands. idk which step im missing

Answer 13

n! / (n -r)!

9! / (9-3)!
9! / 6!

= 504

https://www.google.com/#biw=1440&bih=670&sclient=psy-ab&q=9!+%2F+6!&oq=9!+%2F+6!&gs_l=hp.3..0i22i30l4.1345.2795.0.3035.7.7.0.0.0.0.182.1059.0j7.7.0....0...1c.1.22.psy-ab..0.7.1027.-7pEDiuB7sE&pbx=1&bav=on.2,or.r_cp.r_qf.&bvm=bv.49784469,d.eWU&fp=c632e35ce01e7e0a

Answer 14

I have it! I was forgetting the "!" after (9-3)

Answer 15

ah, yeah. be careful with that

Answer 16

can I work out one and show you to see if I get it right?

Answer 17

sure

Answer 18

\[_{10}C _{4}\] is the equation

Answer 19

my answer is 5040

Answer 20

this a combination, so you have to use a different formula.

(n!) / r!(n-r)!

Answer 21

is that what the C stands for?

Answer 22

yup, P stands for Permutation

Answer 23

ooh okay. let me try again

Answer 24

is it a big number?

Answer 25

nope, not really

Answer 26

I think i did it wrong. I got a big number

Answer 27

I got 108, 864, 000

Answer 28

you should have gotten 210

Answer 29

oh gosh. im going to redo it

Answer 30

\[\left( 10! \right) \div 4! \div (10-4)!\]

Answer 31

= 210??

Answer 32

@blurbendy

Answer 33

10! / (4!(6!))

Answer 34

=
10! / 17280

Answer 35

= 210

Answer 36

oh okay. I was doing the formula wrong. Thank you!

Answer 37

yw