For the book answer for 8.14, why does the answer contain (20 choose 6)'s if the teams are made of 5 students, chosen from a class of 20? Shouldn't the (20 choose 6)'s be (20 choose 5)'s? Is this an error, or am I missing something?
Joyce2E: Feb. 4, 2015, 1:08 p.m.
I have the SAME QUESTION! Can't understand why it's a "6". Any help is appreciated!