The correct answer is 1/6.
Fair dice are those that have an equal chance of falling face-up on the table. When each face of a conventional 6-sided die has the same probability of 1/6, it can be said that the die is "fair."
.Probability is the possibility of rolling one die and getting a finite number (1, 2, 3, 4, 5, and 6). The fundamental principle of probability is to calculate it by dividing the number of outcomes that are possible by the result that you are anticipating. Therefore, a die has six faces or sides, and there are six equivalent likelihoods for each roll. Regardless of which number you select, there is only one result you are hoping for.
P (only one Ace) = (1/10)(11/12)+(9/10)(1/12)
=20/120
=1/6
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