The rules of probability
In probability, we have some rules that become very useful when visualization gets too cumbersome. These rules help us calculate compound probabilities with ease.
The addition rule
The addition rule is used to calculate the probability of either or events. To calculate P(A
B) = P(A or B), we use the following formula:
P(A B) = P(A) + P(B) − P(A ∩ B)
The first part of the formula (P(A) + P(B)) makes complete sense. To get the union of the two events, we have to add together the area of the circles in the universe. But why the ...
Get Principles of Data Science now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
