Every student I teach knows who the president is - and that is it.
We were going over permutations and combinations (order matters in the first but not in the second) and I read the question :"How many ways can you select a president and vice-president out of 20 people? Permutation or combination?" They all responded COMBINATION!
I said "Order doesn't matter? You might want to ask Joe Biden."
Who's Joe Biden?
Gotta love it.
On This Day in Math - August 21
12 minutes ago