How do I calculate probability?

Hi Laura, an event probability is generally defined as (number of occurrences of event) / (number of times event could have occurred). For example if I wanted the probability of me riding a bike to school I would take (number of days I rode my bike to school) and divide it by (number of days I went to school)

The most simple answer is, find the total number of possible outcomes (call that O). Find the number of ways that event your asking about could happen (call that N). The probability of the event is N divided by O (N/O). For example, what is the probability of rolling an even number on a six-sided die? First, state the event, find O, then find N. Event: Rolling an even number O: Number of possible outcomes = 6 (1, 2, 3, 4, 5, or 6) N: Number of even numbers = 3 (2, 4, 6) O = 6, N = 3. N/O = 3/6 =1/2 That's the simples case, though you can ask for more specific examples.

Oh no. For some reason this website removes all the newline spaces. I'll try and use spaces to clear it up. _ _ The most simple answer is, find the total number of possible outcomes (call that O). Find the number of ways that event your asking about could happen (call that N). The probability of the event is N divided by O (N/O). _ _ _ _ For example, what is the probability of rolling an even number on a six-sided die? First, state the event, find O, then find N. _ _ Event: Rolling an even number _ _ O: Number of possible outcomes = 6 (1, 2, 3, 4, 5, or 6) _ _ N: Number of even numbers = 3 (2, 4, 6) _ _ O = 6, N = 3. N/O = 3/6 =1/2 That's the simples case, though you can ask for more specific examples.