Probability

Let a random experiment have sample space S.  Any assignment of probabilities to events must satisfy some basic laws of probability:

  1. For any event A, P(A) ≥ 0.
  2. P(S) = 1. Where S is the sample space
  3. 0 ≤ P (A) ≤  1
The theoretical probability of an event is defined as the ratio:

number of favorable cases


total number of possible cases

Sample Space:  The collection of all possible outcomes

Simple Event:  One specific outcome in the sample space.

 

Learn more about probability by reading the explanation below.

Probability

 


Practice: Find the probability of simple events in the following exercises.

Probability 1

Probability 2

Probability 3