Probability is the ratio of no. of possible outcomes to the maximum no. of outcomes .
If any event doesnt occurs ,then it is 0/N,where N=maximum no of outcomes .and that is 0 itself ,hence that is signified by zero ,or will at max, all the possible outcomes wil occur ,which means N/N that is denoted by 1.
Hence probabilty for the occurance for any event is between 0 and 1.
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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.
The probability of rolling a seven with one roll of a standard number cube is zero.
The probability of rolling a number less than 1 on a standard 6-sided die is zero. It will not happen.
The probability is zero. No number can be less than 3 and greater than 4.
Zero is the smallest probability.