Mathematics
Senior High
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（1）と（2）の式と答えを教えて欲しいです🙇♀️
E
の
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5 先生4人と生徒3人がくじ引きで1列に並ぶとき,次の確率を求めよ
(1) 先生と生徒が交互に並ぶ確率
(2) 両端のうち,少なくとも一方に生徒が並ぶ確率
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