Six friends were sending different messages to each other in a mobile application.
They created all possible five-member groups among themselves, and all possible ones
groups of two.
How many 5-member groups?
How many 2-member groups?
Combinations are difficult to explain. 2 Member groups PERMUTATIONS are obviously 6*5. However, each one is also reversed.
Six friends were sending different messages to each other in a mobile application. They created all possible five-member groups among themselves, and all possible ones groups of two.
How many 5-member groups? How many 2-member groups?
Combinations are difficult to explain. 2 Member groups PERMUTATIONS are obviously 6*5. However, each one is also reversed.