Answer:
28. Option A is correct
29. Option C is correct
Explanation:
28.
Option C and D are not correct because the intersection of O and X is empty.
As data given, the intersection of O and X is {5, 7}
Option B is not correct because the intersection of O and P includes 1.
1 is not a prime number and therefore is not belonged to P.
=> Only option A is valid.
29.
As the picture shown, the intersection of P and T includes 3 and 4.
=> Complement of the intersection of P and T includes all remaining numbers: 3, 2, 5, 1, 6, 4.
The sum of these numbers is: 3 + 2 + 1 + 5 + 6 + 4 = 21
=> Option C is correct
Hope this helps!
:)
