If an event has a probability of zero (0) that means that it cannot happen; it is completely impossible.
If a number has a probability of zero, then it never occurs, no matter how many times you try.
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Probability is on a scale of 1 to 0 and 1 is that .an event will certainly happen whereas 0 is that an event will not happen
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.
The probability is 0 since it did not happen.The probability is 0 since it did not happen.The probability is 0 since it did not happen.The probability is 0 since it did not happen.
It means that the probability density function is symmetric about 0.
The mean must be 0 and the variance must be 1.