P(7,3) =

A. 840
B. 70
C. 35
D. 210

What would the P represent again? :)

Question

P(7,3) =

A. 840
B. 70
C. 35
D. 210

What would the P represent again? :)

anonymous · Answer

D.

anonymous · Answer

Do you know the permutation formula?

anonymous · Answer

7p3
have seven pick 3

anonymous · Answer

No i cant frickin remember it for the life of me!! >.<

anonymous · Answer

it is n!/(n-k)!

anonymous · Answer

plug and solve

anonymous · Answer

It's just like the Combination formula without any division.  multiply descending values until you've written out how many numbers the digit after the P is:
7P3 = 7*6*5 (see, three numbers, descending from 7)

anonymous · Answer

yeah, guys, actually the answer is not D it is A
the equation should be read as we have the number of permutations of 7 taken 3 at a time.

so P(7,3)= "seven factorial divided by three factorial"

anonymous · Answer

D is correct http://www.wolframalpha.com/input/?i=permutaion%287%2C3%29

anonymous · Answer

bah, what would wolframalpha know :P

anonymous · Answer

oh i get it... did it without the difference :?  guess i'll have to learn something today.