What are the odds of hitting a 1 100 twice?

On the second roll, again, 1 in 100 chance. So a 1 in 10 000 chance that a specific number will come up twice on those two rolls, or a 0.01% chance. So for the 100 possible numbers, there is a 100 * 1/10 000 chance of the same number coming up twice. That is 1/100 or 1%.

math.stackexchange.com - If we have had n random number generations between 1 and 100 ...

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If we have had n random number generations between 1 and 100, where n is a number less than 100, what is the probability of the same number coming up twice?

After 2 generations, I'm guessing there is a 1% chance of the same number coming up twice. For any specific number there is a 1 in 100 chance of it coming up on the first 'roll'. On the second roll, again, 1 in 100 chance. So a 1 in 10 000 chance that a specific number will come up twice on those two rolls, or a 0.01% chance. So for the 100 possible numbers, there is a 100 * 1/10 000 chance of the same number coming up twice. That is 1/100 or 1%. After 101 rolls, at least one number will come up twice. So when n=101 then the probability is 100%..

So, after 3 rolls, is there a 2% chance that at least two of the numbers generated are the same? That does not seem right. There are 100^n possible outcomes on n rolls, but how many of those outcomes have at least one number coming up twice?

I saw elsewhere that it is better sometimes to consider the probability of a result not happening. So when n=2 there is a 99/100 chance that the two numbers are different. That is, in 9900 of the 10 000 possible outcomes the two numbers are different. When n = 3 there are 1 000 000 possible outcomes, 100 * 100 * 100. But I do not know how to calculate the number of outcomes in which at least one number does not repeat. Also, if we choose a specific number, what is the chance that it will be generated at least twice after n generations? When n = 2 there is a 0.01% (1/100 * 1/100) chance that, for example, the number 42 will be generated twice. Every extra roll will increase the chance, but by how much? In this case, even after 100 rolls, 42 may not even come up once, let alone twice.

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What does over 1.5 odds mean?

The over 1.5 goals market applies to 90-minute matches (plus additional time) but does not include extra time. For example, an over 1.5 goals bet will win if a match finishes 1-1, 2-1, 2-2, 3-2, and so on. But, the bet will lose if a match finishes 0-0 or 1-0 to either team.

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Over/under 1.5 goals is a popular betting market that covers the total number of goals in a match for both teams. The over/under 1.5 goals market is part of a wide selection of over/under markets which include over/under 0.5, 2.5, 3.5, 4.5, etc. All of these over/under markets have the .5 decimal as there is no possibility for a draw or refund. It is a two-way market, and you either win or lose your bet.

Over 1.5 Goals Explained

Over 1.5 goals in a match mean that 2 or more goals are required to win the bet, and 0 or 1 goal means the bet loses. The over 1.5 goals market applies to 90-minute matches (plus additional time) but does not include extra time. For example, an over 1.5 goals bet will win if a match finishes 1-1, 2-1, 2-2, 3-2, and so on. But, the bet will lose if a match finishes 0-0 or 1-0 to either team.

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