Mathematics
Senior High
Resolved
こうしてはいけないのは何故でしょうか
答えは4/9✖️5/8 です
赤5:青4=入っている袋から
球を続けて2こ取り出す。
1回目青2回目赤の確率
5C1.4C,
1-41
qCz
Cact 69 C₂
10
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