Permutation vs combination Which notation permutation r permutation or r combination would you use in each of the given problems V How many permutations of the letters ABCDEFGH contain the string A 5 combination ABC How many ways are there to select a first prize winner a second prize winner and a third prizewinner from 100 different people who have entered a contest How many ways are there to select five players from a 10 member tennis team to make a trip toa match at another school A group of 30 people has been trained as astronauts to go on the first mission to Mars How many ways are there to select a crew of six people to go on this mission assuming that all crew members have the same job B Permutation C 8 permutation D 3 permutation E 5 permutation F 6 combination G 3 combination