+130511 We need a permutation for this one.
(5 P 2) = 20
If we had just wanted to count all the possible sets that could be formed by choosing 2 people from any 5, the answer would have been 10. But, the permutation considers order within sets.
Thus, the set {person 1 , person 2} is considered a different set from {person 2 , person 1}.
+130511 We need a permutation for this one.
(5 P 2) = 20
If we had just wanted to count all the possible sets that could be formed by choosing 2 people from any 5, the answer would have been 10. But, the permutation considers order within sets.
Thus, the set {person 1 , person 2} is considered a different set from {person 2 , person 1}.
