I'm no quant but pretty sure to calculate the probability of two random events you use a union function, basically means probability of an event occurring in a

I'm no quant but pretty sure to calculate the probability of two random events you use a union function, basically means probability of an event occurring in a or b. https://people.richland.edu/james/lecture/m170/ch05-rul.html https://people.richland.edu/james/lecture/m170/ch05-rul.html