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Bab HimpunanMatematika SMP Kelas VIII
Diterima sebagai karyawan jika lulus tes tertulis dan wawancara
s = semua pelamar
a = wawancara
b = tertulis
n(s) = n(a) + n(b) - n(a∩b) + n(a∪b)'
69 = 32 + 48 - n(a∩b) + 6
n(a∩b) = 86 - 69
n(a∩b) = 17 pelamar