At the end of the movie, the teacher (Samuel L. Jackson)and a hispanic student are playing russian roulette.The student said he had a 1 in 6 chance of getting shot when there was 2 bullets in the gun.You do the math.
Actually, there WAS one bullet in the gun when he said that. Because just before Caesar said he had 1 in 6,Samuel had blown his brains out with the other one. Since the bullets had been placed together in the chamber and one had just been fired, Caesar had a 50/50 chance...thank you,thank you.
I also forgot to add that Caesar saying he has 1 in 6 chances is probably not an error either. Think of the character portrayed hear and the theme of his ignorance in relation to his acts of violence. Just plain dumb.