The easy way to do a problem like this is with a table:
Code:
P(A) P(notA) Total
P(B) .11 .24
P(notB)
Total .16 1
This has what we know filled in, including that the totals have to add up to 1 in each direction. With the entire table filled in, we get:
Code:
P(A) P(notA) Total
P(B) .11 .13 .24
P(notB) .05 .71 .76
Total .16 .84 1
Then pick the probability of interest, which is 1-[P(notA) AND P(notB)] = 1-.71 = .29