Question 1042548
P(A∩B) = 1/6 and 1 - P(A∪B) = 1/3, as given.

==> 1 - P(A∪B) = 1 - (P(A) + P(B) -  P(A∩B)) = 1/3.

==> 1 + P(A∩B) - 1/3 = P(A) + P(B)

==> 1 + 1/6 -1/3 = P(A) + P(B)

==> P(A) + P(B) = 5/6.