Question 1145049: Hello, I need help with certain question from my math hw. It's an online assignment, but none of said values shows. Maybe it's something I missed?
Find the indicated values.
(a)
wPw − 2
(b)
wCw − 2
Found 2 solutions by richwmiller, ikleyn:
Answer by richwmiller(17219)   (Show Source):
Answer by ikleyn(52776)  (Show Source):
You can put this solution on YOUR website! .
(a) wPw-2 is the standard designation for the number of PERMUTATIONS.
The only way to interpret wPw-2, which I know, is wP(w-2), which is
wP(w-2) = w*(w-1)*(w-2)* . . . *3 (in all, there are (w-2) factors in the product).
To calculate it, the value of w must be given.
For example, at w= 5 wP(w-2) is 5P3 = 5*4*3 = 60.
(b) wCw-2 is the standard designation for the number of COMBINATIONS.
The only way to interpret wCw-2, which I know, is wC(w-2), which is
wP(w-2) = 
To calculate it, the value of w must be given.
For example, at w= 5, wC(w-2) is  =  =  = 10.
Generally speaking, it is very strict and unexpected move from your side (if to use the "chess" language) -
- to come to the forum and to ask about something, you don't know about what.
It is not the way and not the level to discuss something "on substance".
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