Question

Evaluate P(3, 0).

Answer 1

Is there an equation?

Answer 2

Im doing Probability and Statistics in math

Answer 3

Like 7! over 8!6!

Answer 4

I have also just started to learn Probability :o

Answer 5

I hate probability it dosent sick in!

Answer 6

No it's nice,I like it.

Answer 7

You mean permutations?
P(m, n) = m!/(m - n)!

Answer 8

Questions like this i have just started :
^10P3 and ^7C4. @MKTY

Answer 9

\[\bf P(3,0)=_{3}P _{0}=1\]

Answer 10

It's just the number of permutations where as "C" would imply combinations.

Answer 11

P(n,0) is defined as 1 since NOT picking anything is one option

Answer 12

Ya permutations

Answer 13

but what is P(3, 0), is it one?

Answer 14

3!/3! ....

Answer 15

1 ok

Answer 16

So now what would C(10, 3) be?

Answer 17

P(10,3)
-------
3!

Answer 18

So C(10, 7)?

Answer 19

consider the P to mean "pick"

P(n,r) refers to starting at n, and picking r numbers:

P(10,3) refers to: 10.9.8

3! can be thought of as P(3,3) if need be

soo


10.9.8
------- = C(10,3)
3.2.1

Answer 20

10.9.8
------
3.2.1



10.9.8
------
3.2


10.3.8
------
2


10.3.4 = 10.12 = 120

Answer 21

i find keeping it all factored helps to notice what parts can cancel or simplify out

Answer 22

ya

Answer 23

C(10,7) = P(10,7)/7!


10.9.8.7.6.5.4
--------------
7.6.5.4.3.2.1


10.9.8
------
3.2.1

so C(10,7) is equal to C(10,3)

Answer 24

Nice, I did it right and your examples made it easyer for me to do it next time thanks