Question

A standard die is rolled. P(A)= the probability of rolling a three

P(B)= the probability of rolling a even number
What is P(A or B)

Answer 1

To find the probability of A or B, add the two probabilities (since they are mutually exclusive).

P(A)= 1/6 since 3 is one possibility out of 6
P(B)= 1/2 since there are 3 numbers that mke this true out of 6 and 3/6= 1/2

P(A or B)= 1/6+1/2
P(A or B)= 2/3

Final answer: 2/3