中学数学.確率.確率の計算2-5硬貨4枚を投げる.mts

2013 3:22
Synopsis
4枚の硬貨を同時に投げるとき次の場合の確率を求めなさい。 (1)4枚とも裏が出る。 (2)少なくとも1枚は表が出る。
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