Caitlyn calculated the probability of the complement of rolling a number greater than 2 on a 6-side number cube. She made her calculation as follows.P(less than or equal to 2):Did she make an error? Explain.

Answer:

Yes, Caitlyn made an error. Probability is calculated by dividing the number of favorable outcomes by the total number of possible outcomes. For the complement of rolling a number greater than 2 (which is rolling a 1 or 2), there are 2 favorable outcomes and 6 total possible outcomes. Her calculation of 4/2 is incorrect; the correct probability should be 2/6, which simplifies to 1/3.