Mathematics
Junior High
教えてくださいm(_ _)m
(2) Aさんがこのくじを1本ひき, ひいたくじをもとにもどさずに、 続け
てBさんがくじを1本ひくとき, AさんとBさんがともにはずれをひく
確率を求めなさい。
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