Question

15c2/7c6

Answer 1

Do you have instructions for this problem?

Answer 2

Its use the formula nCr to evlauate the expression

Answer 3

On your graphing calculator?

Answer 4

yeah

Answer 5

what would it come out to

Answer 6

15

Answer 7

no

Answer 8

What do you mean? Did I mess up?

Answer 9

its not 15

Answer 10

Hang on...

Answer 11

15c2=105 and 7c6=7 right?

Answer 12

yes

Answer 13

So, 105/7=15 right? Or maybe I misread your equation...

Answer 14

What did you get?

Answer 15

\[\frac{\frac{15!}{2!13!}}{\frac{7!}{6! }}=15 \]
The cobination of 15 things taken 2 at a time divided by 7 things taken 6 at a time?

Answer 16

That's what I thought too

Answer 17

I typed in 15 and it said wrong

Answer 18

I posted as soon as something worked out and did not realize that you had posted. Sorry.

Answer 19

so

Answer 20

No problem robtobey. Hang on prettychicka45, I'm thinking...

Answer 21

So your problem looks exactly like this: \[15c2/7c6\]

Answer 22

Meaning 15c2 divided by 7c6 right?

Answer 23

yes

Answer 24

O.K...

Answer 25

i

Answer 26

Still not seeing why 15 is wrong... Thinking...

Answer 27

Anything else in your instructions? Any other hints?

Answer 28

it says to type as a fraction

Answer 29

Try typing 15/1

Answer 30

it was 65

Answer 31

OK, that's not quite making sense...

Answer 32

That's not even a fraction

Answer 33

Sorry

Answer 34

Any thoughts anyone?