... later found to be virtually worthless.

Poisson, Monte-Carlo, Chi-Square, Probability, Combinations, Permutations, Correlation, t-Distribution, F-Distribution ... blah, blah, blah

Calculus, on the other hand, is quite useful ... but only for those who know how to use it.

When you are required to take subjects in which you have virtually no interest, you know you are receiving a superior education.

I do use the Monte Carlo method to determine the odds that a well-traveled traffic light will be green so I won't have to stop. That's really impressive, right?

Also, your odds of winning a lottery are related:
(# of #s needed to win factorial) X ((total # of #s minus total # of #s needed to win) factorial) divided by (total # of #s factorial). You can't win if you don't play. You can't win if you do play.