Probability: Calculating The Likelihood Of Events With Simple Formulas

probability of an event P(A) =

#of outcomes in event A / total # of outcomes.

The probability of an event P(A) is a measure of the likelihood that event A will occur. It is represented by a number between 0 and 1, inclusively. An event with a probability of 0 means that it will not occur, while an event with a probability of 1 means that it will definitely occur.

To calculate the probability of an event, we use the following formula:

P(A) = (Number of favorable outcomes) / (Total number of outcomes)

For example, if we want to calculate the probability of rolling a 2 with a fair six-sided dice, the number of favorable outcomes is 1 (there is only one face of the dice with the number 2), and the total number of outcomes is 6. Therefore, the probability of rolling a 2 is:

P(rolling a 2) = 1/6

In summary, probability is a measure of how likely an event is to occur and is represented by a number between 0 and 1, inclusively. To calculate the probability of an event, we use the formula P(A) = (Number of favorable outcomes) / (Total number of outcomes).

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