This would lead to these events being independent. Also, if you had probability of B given A is equal to the probability of B, same argument. That would mean they're independent. Or if we said that the probability of A and B is equal to the probability of A times the probability of B, then these would also mean they're independent. We know that this one's true. The probability of A and B is one-sixth, and the probability of A times the probability of B is one-half times one-third, which is one-sixth. So all of these are clearly true, so we can say that A and B are independent.