What is the probability of rolling a 1 or a 3 on six-sided die?

What is the probability of rolling a 1 or a 3 on six-sided die?
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Assuming a standard die with sides numbered {1, 2, 3, 4, 5, 6},then:There are 2 ways of success: roll a 1 or 3There are 6 possible outcomes→ pr(1 or 3) = 2/6 = 1/3
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