Question

1. What formula is used to find the theoretical probability of an event?
P(event) = _______________________________________________

Answer 1

This definition is for equally likely outcomes. If an experiment can produced N mutually exclusive and equally likely outcomes out of which n outcomes are favorable to the occurrence of event A, then the probability of A is denoted by P(A)=n/N. This is called the classical definition.

Answer 2

The so-called relative frequency definition is: If an experiment is performed N times, and event A occurs n times, then the ratio is the probability of event a approximately P(A)=n/N.

Answer 3

As N goes to infinity, the relative frequency definition tends towards the classical definition.