Question pertaining to probability/sets

Question

Use the given information to find the indicated probability: P(A U B)= .7, P(B) = .6, P(A∩B) = .5 Find P(A).

Answer 1

P(AUB) = P(A) + P(B) - P(A^B)

.7 = P(A) + .6 - .5

.7 = P(A) = .1

P(A) =.7 - .1

P(A) = .6

It might help to sketch a Venn diagram, with two overlapping circles