Probability

A random experiment is an activity

A random experiment is an activity where we know all possible results but cannot predict the exact outcome in advance. For example, tossing a coin has

When all possible outcomes of

When all possible outcomes of an experiment have the same chance of occurring, they are called equally likely outcomes. In a fair coin toss, Head and

P(Event) = Number of favorable outcomes

P(Event) = Number of favorable outcomes / Total number of possible outcomes. For example, probability of getting an even number on a dice = 3/6 = 1/2

A trial is a single performance

A trial is a single performance of a random experiment (like one coin toss). An event is a specific outcome or collection of outcomes we're interested

Probability values always lie between 0

Probability values always lie between 0 and 1 (inclusive). P = 0 means impossible event, P = 1 means certain event. The sum of probabilities of all po