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Verified answer
Mapel : MatematikaBab : Himpunan
B = {2,3,5,7,11,13}
n(B) = 6
ditanya Himpunan Bagian B yang memiliki 3 anggota
Maka,pakai Kombinasi/Faktorial
6C3
3 dari soal
6!/(6 - 3)!3!
= 6 × 5 × 4 × 3!/3! × 3 × 2 × 1
= 120/6
= 20 (D)
atau
6C3