October 2018 1 40 Report
Sebuah kotak berisi 10 kelereng, 6 diantaranya merah, 4 yg lain putih. dari kotak itu di ambil 3 kelereng secara acak. Berapa peluang jika:
a. semua kelereng putih
b. 2 kelereng merah dan 1 putih.
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