If a pair of standard dice are rolled, what is the probability that one of the dice will be a 3 and the other a 4?

The probability for any number to be rolled on a dice is 1/6. So the probability that you would roll a 3 is 1/6 and the probability that you would roll a 4 is 1/6. You would then multiple time together to get your final probability 1/6 x 1/6 = 0.0278 or 2.78% probability.