Probability

Probablity

Probability-A branch of math that deals with uncertainty. It is the likliness of an occurance. Probability is used for many things like gambiling and meterology.
-Probability can be shown in terms of percentages.
-Probability runs between the number 1 and 0. It it usually represented as a fraction and reduced.
-You can determine the probability either empirically or theoretically. In math we mostly use empirical beacause they are based on exact observations.
-An experiment can be done to determine your own statistics to find the probability of something.

Formulas:
*Probability of either of two events: P(A+B) = P(B) + P(A) - P(A and B)
Similar to Compliment formula

*Probability of eith of two mutually exclusive events (means that they happen at the same time) : P(A or B) = P(A) + P(B)

Ex.1If there are 6 apples, 3 oranges, and 1 plum in a basket, what is the probability of choosing an apple without looking in the basket?

Solution:

P(choosing an apple)= 6/10 = 3/5 = 0.6 = 60%

The numerator is 6 because there are six apples in the basket, therefore six favorable outcomes. The denominator 10 because there are 10 fruits in the basket (the total number of outcomes).