September 2018 1 65 Report
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1. Jika a, b, 15, c, dan d membentuk barisan aritmetika, mka a + b + c + d = …
2. Misalkan S = {21, 22, 23, …, 30}. Jika empat anggota S diambil secara acak, maka peluang terambilnya empat bilangan yang berjumlah genap adalah ….
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