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A fair 6-sided number cube is rolled once and a fair coin is flipped once. What is the probability that on odd number is rolled and a head is flipped?
These events are independent so you multiply their probabilities.
P(odd on the cube) = 3/6 = 1/2
P(head on the coin) = 1/2
P(odd and head) = (1/2)(1/2) = 1/4