My question seems simple but I can't figure out how to get to a mathematical answer. It has something to do with the binomial coefficient as it is 73 choose 4 but I'm not sure how to represent repeating that over and over again til all 73 options have been chosen.
fyi, I created a little sim in python as it was the only way I could get my head around solving this and came up with an answer of 88.5 ish but it seemed pretty variable, unsurprisingly. I still would love to see a mathematical derivation of this though so I can create some graphs and standard deviations and whatnot