The use of probability is made in various cases in real life.
1. To find characteristics of a large group by using a small part of the group.
For example , during elections ‘an exit poll’ is taken. This involves asking the people whom they have voted for, when they come out after voting at the centres which are chosen off hand and distributed over the whole area. This gives an idea of chance of winning of each candidate and predictions are made based on it accordingly.
2. Metrological Department predicts weather by observing trends from the data over many years in the past.