tolong di jawab ya pake cara!

Bab Himpunan
Matematika SMP Kelas VII

8] P = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
Q = {2, 3, 5, 7, 9}
P∪Q = {1,2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}

jawabannya D

9] C = { 2, 4, 6, 8, 10, 12 } → ada 6
D = {1, 2, 3, 6, 9, 18} → ada 6

C ∩ D = {2, 6} → ada 2
n(C ∩ D) = 2 buah

jawabannya A