Quote:EvenBobIt's not unusual for a number to sleep for 400 spins.

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Something like 0.09% that at least one number doesn’t appear in the next 400 spins.

Quote:fire67birdI walk up to a roulette table and see the stats say 17 is cold and hasn’t hit in the last 50 spins. I then bet on 17 for another 52 spins of the wheel. When calculating the probability of a number to not hit, does it make any sense to use 102 spins as opposed to the 52 that I actively bet on.

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No, because "the probability of a number not hitting in 102 consecutive spins" and "the probability of a number not hitting in 102 consecutive spins given that it has already not hit in the first 50 of those 102 spins" are two entirely different things.

Quote:unJonQuote:EvenBobIt's not unusual for a number to sleep for 400 spins.

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Something like 0.09% that at least one number doesn’t appear in the next 400 spins.

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Yep, but you would be amazed at how often a single number will sleep for hundreds of spins. 150 spins could easily be 5 hours at a brick and mortar Casino.

Quote:MorstanaIt is important to remember that each spin of roulette is independent of previous spins. Just because the number 17 didn't come up in the last 50 times, doesn't increase its chances in the next spin. It is best to bet based on your strategy and bankroll, not on past results.

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It’s also important to remember that the only reason each spin is independent is because of random rotor speed. Otherwise a roulette wheel is as random as my comments and what each one of my posts are about.

Quote:fire67birdWhen calculating the probability of a number to not hit, does it make any sense to use 102 spins as opposed to the 52 that I actively bet on.

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Do not consider old spins. In double-zero roulette, the probability of a specific number not hitting in 52 spins is (37/38)^52=24.99%.