If an event is certain to happen the probability of the event is 1?

Question

is this true

Answer 1

nothing is certain except death and taxes

Answer 2

True.

The probability of an event is generally represented as a real number between 0 and 1, inclusive. An impossible event has a probability of exactly 0, and a certain event has a probability of 1, but the converses are not always true: probability 0 events are not always impossible, nor probability 1 events certain. The rather subtle distinction between "certain" and "probability 1" is treated at greater length in the article on "almost surely".

Most probabilities that occur in practice are numbers between 0 and 1, indicating the event's position on the continuum between impossibility and certainty. The closer an event's probability is to 1, the more likely it is to occur.

Answer 3

Yes.

Degree of likelihood that something will happen. Probabilities are expressed as fractions (1⁄2, 1⁄4, 3⁄4), as decimals (.5, .25, .75), or as percentages (50%, 25%, 75%) between 0 and 1. For example, a probability of 0 means that something can never happen; a probability of 1 means that something will always happen. The probability of an event is calculated as follows:

EXAMPLE:

The probability of getting heads in one toss is: p(heads) = 1/(1 + 1) = 1⁄2.

Answer 4

Yes, if it is absolutely, positively going to happen with 100% certainty, the probability is 1. If there is absolutely no way for it to happen, the probability is zero.

If it is 50/50 (such as tossing a coin), the probability is .50.

Answer 5

clear true