Plus One Maths Notes Chapter 16 Probability is part of Plus One Maths Notes. Here we have given Kerala Plus One Maths Notes Chapter 16 Probability.
|Text Book||NCERT Based|
|Category||Plus One Kerala|
Kerala Plus One Maths Notes Chapter 16 Probability
- Random Experiments: An experiment is called random experiment, if it satisfies the following two conditions:
- It has more than one possible outcome.
- It is not possible to predict the outcome in advance.
- Outcome: A possible result of a random experiment is called its outcome.
- Sample Space: The set of all possible out-comes in a random experiment is called a sample space.
- Trial: When an experiment is repeated undersimilar conditions and it does not give same result each time but may result in anyone of the several possible outcomes, the experiment is called a trial.
- Event : Every subset of a sample space is called an event.
- Mutually Exclusive Event: A and B are mutually exclusive if A ∩ B = φ
- Algebra of Events: We can combine two or more events by using the operators of sets union (∪), intersection (∩), difference (-), complement (’).
- Equally likely outcomes: All outcomes with equal probability.
- Probability of an event: For a finite sample space with equally likely outcomes.
Probability of an event
, where n(A) = number of elements in the set A,
n(S) = number of elements in the set S.
If A and B are mutually exclusive, then P(A or B) = P(A) + P (B) – P(A and B)
P(A ∪ B) = P(A) + P(B) – P(A∩B)
If A and B are mutually exclusive, then P(A or B) = P(A) + P(B)
If A is any event, then P(not A) = 1 – P(A)
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