Strangely, ten reds in a row is not particularly good evidence of an unfair wheel. For an American wheel, the odds of red in a single spin is 18/38= 0.4737. So

Strangely, ten reds in a row is not particularly good evidence of an unfair wheel. For an American wheel, the odds of red in a single spin is 18/38= 0.4737. So ten in a row is 0.4737^10, which is about 0.0005689. So one should expect five or so such sequences in ten thousand spins. Or one in every two thousand spins. If a casino spins its roulette wheel 200 times a day, you would expect to see a sequence of ten reds in a row every ten days. If the casino runs ten roulette wheels, it's an every day occurrence. Low probability events happen regularly with enough samples.