tolong ya pliss... no 105....sm caranya

Bab Himpunan
Matematika SMP Kelas VIII

IPA = A
IPS = B
semua = S

n(S) = n(A) + n(B) - n(AnB) + n(AuB)'
45 = 20 + 28 - 8 + n(AuB)'
n(AuB)' = 45 - 40
n(AuB)' = 5 siswa

◎◎ C ◎◎