For probability, you can focus on discrete-valued random variables (this is what is covered in high schools in Poland). Don't need any calculus for that.
Good old frequentist Bernoulli and conditional probability.
The problem with it is applying it to life, which is more often Bayesian.
Sadly the high school level math can never be reasonably complete.
They should mention statistical tests and normal distribution at some point, as concepts.
The problem with it is applying it to life, which is more often Bayesian.
Sadly the high school level math can never be reasonably complete. They should mention statistical tests and normal distribution at some point, as concepts.