Zero.
It is 1.
Yes, a probability of 0 is something that cannot happen.
It depends on what the "something" is. The probability that the roll of a regular die will never exceed 6 is 1. The probability that the roll of a regular die will never exceed 3 is 0.5. The probability that the roll of a regular die will never exceed 0 is 0.
The probability that an event will not occur is calculated by subtracting the probability of the event occurring from 1. Given that the probability of the event occurring is 0.2, the probability that it will not occur is 1 - 0.2 = 0.8. Thus, there is an 80% chance that the event will not occur.
A ratio is a comparison of the relative size of two different things. Probability is the change that something will (or will not) occur. Probability can be expressed as a ratio of Yes to No (or, "will occur" to "won't occur"). That is, Probability is the relative size of Yes to No. So, if something is said to have a 60% Probability of occurring, what that is indicating is that, out of 100 tries, 60 will be the outcome indicated. While probability is usually expressed as a percentage, it is entirely possible to express it as a ratio. In the aforementioned example, a 60% Probability of occurrence could also be said to be a 60:40 (or, reduced, 3:2) ratio in favor of happening.
probability
an impossible event has a probability of 0, it will never occur a certain event has a probability of 1, it will always occur
It is 1.
probability
probability is the chance or likely hood that something will occur
Probability is the likelihood that something will occur. If you subtract it from 1, we get the likelihood (or probability) that it will not occur. If a coin is tossed and rolls heads 6 times, the (empirical) probability of obtaining a head is 6/10 or .6. 1-.6 =.4 is the empirical probability (or likelihood) of not getting a head.
probability
Yes, a probability of 0 is something that cannot happen.
It depends on what the "something" is. The probability that the roll of a regular die will never exceed 6 is 1. The probability that the roll of a regular die will never exceed 3 is 0.5. The probability that the roll of a regular die will never exceed 0 is 0.
Probability is the likelihood of something happening. It is the extent to which something is likely or unlikely to occur.
Probability is a numeric expression of the "odds" that something will happen.
The probability that an event will occur plus the probability that it will not occur equals 1.