what is probability ??
Answers
Answer:
Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true. The probability of an event is a number between 0 and 1, where, roughly speaking, 0 indicates impossibility of the event and 1 indicates certainty.
Explanation:
pls mark me as brainlist
Answer:
Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true. The probability of an event is a number between 0 and 1, where, roughly speaking, 0 indicates impossibility of the event and 1 indicates certainty.
Probability = the number of ways of achieving success. the total number of possible outcomes. For example, the probability of flipping a coin and it being heads is ½, because there is 1 way of getting a head and the total number of possible outcomes is 2 (a head or tail). We write P(heads) = ½ .
P(A) refers to the probability that event A will occur. P(A|B) refers to the conditional probability that event A occurs, given that event B has occurred. ... refers to the probability of the union of events A and B. E(X) refers to the expected value of random variable X
P(A) is the probability of an event “A” n(A) is the number of favourable outcomes. n(S) is the total number of events in the sample space.
...
Basic Probability Formulas.
All Probability Formulas List in Maths
Conditional Probability P(A | B) = P(A∩B) / P(B)
Bayes Formula P(A | B) = P(B | A) ⋅ P(A) /
If A and B are two events defined on a sample space, then: P(A AND B) = P(B)P(A|B). This rule may also be written as P(A∣B)=P(A AND B)P(B) P ( A ∣ B ) = P ( A AND B ) P ( B ) (The probability of A given B equals the probability of A and B divided by the probability of B.) If A and B are independent, then P(A|B) = P(A).