what is meaning of probability
Answers
Answer:
Probability is simply how likely something is to happen. Whenever we're unsure about the outcome of an event, we can talk about the probabilities of certain outcomes—how likely they are.
❝ Probability theory is nothing but common sense reduced to calculation. ❞
Explanation :
To understand and measure the chance, we perform the experiments like tossing a coin, rolling a dice and spining the spinner etc. When we toss a coin we have only two possible results, head or tail. Suppose you are the captain of a cricket team and your friend is the captain of the other cricket team. You toss the coin and ask your friend to choose head or tail. Can you control the result of the toss? Can you get a head or tail that you want? In an ordinary coin that is not possible. The chance of getting either is same and you cannot say what you would get. Such an experiment known as 'random experiment'. In such experiments though we know the possible outcomes before conducting the experiment, we cannot predict the exact outcome that occurs at a particular time, in advance. The outcomes of random experiments may be equally likely or may not be. In the coin tossing experiment head or tail are two possible outcomes.
Uses of Probability in real life :
- Meteorological department predicts the weather by observing trends from the data collected over many years in the past.
- Insurance companies calculate the probability of happening of an accident or casuality to determine insurance premiums.
- "An exit poll" is taken after the election. It is surveying the people to which party they have voted. This gives an idea of winning chances of each candidate and predictions are made accordingly.