0
Anonymous
Chat with our AI personalities
sharp-eyed, sharp-eyes, sharp-faced, sharp-shod, sharpshooter, sharp-tongued, sharp-witted
-9
p = r - c r - c = p r - c - r = p - r -(-c) = -(p) c = -p
n p =n!/(n-r)! r and n c =n!/r!(n-r)! r
It equals R.