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    IBEasyProbability10–12

    Basic Probability

    Probabilidade Básica

    A die is rolled. What is the probability of rolling an even number or a number greater than 44?

    Even = {2,4,6}\{2, 4, 6\}. Greater than 44 = {5,6}\{5, 6\}. Use the union formula.

    Solution

    Step 1 of 2

    1. 1.P(even)=36P(\text{even}) = \frac{3}{6}, P(>4)=26P(>4) = \frac{2}{6}, P(even∩>4)=P(6)=16P(\text{even} \cap >4) = P(6) = \frac{1}{6}