1. determine whether the situation is a permutation or a combination (you are going to adopt two puppies from a litter of 7 puppies) a)permutation b) combination c) permutation and combination d) none of the above 2. determine whether the situation is a permutation or a combination (you are going to arrange 7 books on a shelf) a)permutation b) combination c) permutation and combination d) none of the above 3. find the value of the expression: 7c5 a) 2 b)21 c)2520 d)5040 4. gregg want to but 12 songs but can only afford 7. how many ways can he buy 7 songs out of 12? a)3,991,680 b)95,040 c)792 d)84 a clothing store sells 10 different styles of men's shirts . how many way's can a costumer purchase 2 or 3 shirts? a)45 b)120 c)252 d)165