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The probability of an event is one when the event is absolutely certain to happen.
It is more useful to understand why the sum of probabilities of an event adds up to one. If you have an event with a probability of p, then the probability of the event not occurring is 1 - p. This is because p plus (1 - p) is 1. That seems trivial, but consider a realistic example...
Lets say you are subject to random drug testing, and that you are in a 100% pool such as might be mandated by 10CFR26, "Fitness for Duty in a Commericial Nuclear Power Plant". What is the probability that you will be chosen at least once in a year?
Well, if sampling occurs five days a week, then there are 260 samples per year. The probability of being chosen in one sample is 1 in 260, or 0.003846. That means the probability of not being chosen is 259 in 260, or 0.9962. The probability, then, of not being chosen in one year is (259 in 260) raised to the 260th power, or 0.3672, which is about 95 in 260. Invert once again, and you see that the probability of being chosen at least one time in a year is 165 in 260, or 0.6328.
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Probability of event occurring to it not occurring?
p/(1-p) The sum of the probability of an event occurring plus it not occurring equals 1.
What is the probability that an event will occur between z equals -0.46 and z equals 2.21 on the standard normalized curve?
The probability is 0.664
What is an event called if the probability it will occur equals 1?
A certainty.
What is the meaning when the probability of the event equals 0?
It's unlikely to happen
What does it mean if the probability of an even number is 0?
If the probability of a event is zero, then the event cannot occur. Therefore, if the probability of an even number is zero, then the probability of an odd number is one.
What is the probability of an event occurring to the probability that it will not occur?
The probability that an event will occur plus the probability that it will not occur equals 1.
Probability of event occurring to it not occurring?
p/(1-p) The sum of the probability of an event occurring plus it not occurring equals 1.
What is the probability that an event will occur between z equals -0.46 and z equals 2.21 on the standard normalized curve?
The probability is 0.664
What is a probability event that is impossible?
A probability event that is impossible is one that will not happen, i.e. its probability is zero.
What is the meaning when the probability of the event equals 0?
It's unlikely to happen
What is an event called if the probability it will occur equals 1?
A certainty.
Can you have a probability greater than one?
No. Probability ranges from zero, meaning the event will not happen, to one, meaning the event will happen.
What is the probability of an event b that impossible?
The probability of an impossible event is 0.The probability of an impossible event is 0.The probability of an impossible event is 0.The probability of an impossible event is 0.
What event is it whose probability depends on one or more event?
A conditional event.
What does it mean if the probability of an even number is 0?
If the probability of a event is zero, then the event cannot occur. Therefore, if the probability of an even number is zero, then the probability of an odd number is one.
What is the probablity of an event that is impossible?
The probability of an impossible event is 0.The probability of an impossible event is 0.The probability of an impossible event is 0.The probability of an impossible event is 0.
How do you find the probability of the complement of an event?
The probability of the complement of an event, i.e. of the event not happening, is 1 minus the probability of the event.
