Conditionl Probability | Probability theory
Concept of Probability
A probability refers to the percentage chance that something will or will not happen. Probability of any EVENT is a number between 0 and 1. If we are sure that the event will occur, we say that its probability is 100% or 1. But if we are sure that the event will not occur, we say that its probability is 0. Note that the probability measures the amount of uncertainty.
The concept of probability is required for understanding of communication systems and many other real-life subjects.
Probability = 1 —— the required event is certain to occur (SURE EVENT)
Probability = 0 —— No chance of occurring (IMPOSSIBLE EVENT)
The word ‘Probability’ is used very often in our daily life; such as ‘probably it will rain in the evening’, ‘what is the probability of getting double head in a throw of a pair of coins?’ and so on.
Problem on Conditional Probability
Problem on Joint Probability
