P(A) = 1/2
P(B) = 1/3
PIAN B) = 1/6
Find P(AUB)

[tex]P(A\cup B)=P(A)+P(B)-P(A\cap B)[/tex]
so that P(A U B) = 1/2 + 1/3 - 1/6 = 2/3