Assume that P(A) = 0.4, P(B) = 0.4, and P(A∪B) = 0.7. Find P(A∩B) and P(A complement ∩ B complement).

Answer 1

Recall:
P(A∪B) = P(A) + P(B) - P(A∩B)
do we already given 3 of the unknown for this expression to find P(A∩B) ?