Combinations When we think about combinations we do not allow repeats and unlike permutations we do not consider order. Combinations look at the numbe
{"Image DocumentName": "CombinationsWhen we think about combinations we do not allow repeats and unlike permutations we do not consider order.", "Image ImageDescription": "Combinations look at the number of different ways of picking a subset of k elements from a set of n elements. Think of the number of ways of picking a list of k distinct elements of n. no. of choices. n. n-1. n-k-2. n-k-1. places. = n(n-1)(n-2) (n-k-1) = n!/(n-k)! For each possible list there are k! permutations. so since we are not interested in order we. should divide the above by k!. C(n,k) = Cnk = n!/(n-k)!k!", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}