Answer
The two statements in a and b are logically equivalent
Work Step by Step
Assign each quality to a variable, Double math major = x, Math major = y, Computer Science major = z
Look at what both statements claim is true
A states that for Bob x∧z holds true, and that for Ann, y∧(~(x∧z)) holds true
B states that for one of Bob and Ann ~(x∧z) holds true. B also states that for Ann, y holds true, and for Bob, x∧z holds true. Using this new information we can assume that the ~(x∧z) case described earlier applies to Ann, as it contradicts the case for Bob, therefore y∧(~(x∧z)) holds true for Ann.
The two final logic statements for each person from each statement match, with Bob being x∧z, and Ann being y∧(~(x∧z)), therefore the two statements are logically equivalent.
