(number of elements in set A/number of times event A can occur) divided by (number of elements in the Universal set)

Probability of event 'A' is equal to (Number of Event A occurred) divided by (Total Number of Events occurred in Sample Space):

P(A) = n(A)/n(S); where 'A' is Event 'A' Occurred and 'S' is Total Number of Events in Sample Space

Probability of an event = (number of favourable outcomes) / (total number of outcomes)

Hi Rusty,

Probability = Number of favourable Outcomes / Total Number of Outcomes

p (A) = f / N

You need to start by finding the probability of a single outcome. Then find the total number of outcomes that can occur. Finally divide the number of events by the number of possible outcomes.

Probability = (Number of a Favourable outcome) / (Total number of outcomes) 

The formula to find probability is

The probability of an event say A is the ratio of the number favorable outcome in A to the total possible outcome from the sample of events.

P(A) = n(A)/N

Hi Rusty! Due to probability relating to the likelihood of an event occuring, the formula is as followed. It is important to note that probability can be displayed as either a fraction or a decimal.

Probability = the number of times the desired outcome was achieved / the total number of outcomes

Hope this helped!

number of objects in interest / total number of objects

P = n (E) / n (S)

P - Probability

E - Event

S - Sample space

Probability of an event = (number of favourable outcomes) / (total number of outcomes)

Probability = (Number of a Favourable outcome) / (Total number of outcomes) P = n (E) / n (S) Where P is the probability, E is the event and S is the sample space.

Probability of an event = (number of favourable outcomes) / (total number of outcomes)

Let E be an Event and P(E) be the Probability of event E happening

P(E) = n(E) / n(S)

where n(E) is the number of times event E occur and

n(S) is the total sample size of the experiment

P(A) = Number of favourable outcome/Total number of favourable outcomes