Probability Class 9 Formula
In this page we have given list of formula for Probability Class 9. Hope this Probability Class 9 Formula will help students to quickly solve Probability math.
1) Probability – To recall a chance of an event happening is called as probability. It is a chance of prediction.
2) Theory of Probability- A measure of uncertainty is provided by a branch of Mathematics called “Theory of Probability”.
3) P(A) = n(A) / n(S)
Where P(A) is the probability of event A
Where n(A) is the number of outcome of event A
Where n(S) is the sample space of event S.
4) The probability of an event lies between 0 to 1.
5) Trial : Trial is an action which results in one or several outcomes.
6) Event : Event for an experiment is the collection of some outcomes of the experiment.
7) Disjoint Events: P(A ∩ B) = 0
8) Bayes Formula: P(A | B) = P(B | A) ⋅ P(A) / P(B)
9) Complementary Event : P(A’) + P(A) = 1
Also See: Triangle Class 9 Math Formula