【これだけspi2】(12)確率（玉の取り出し）
Synopsis
ＳＰＩ２でよく出題される「確率（玉の取り出し）」についての解説。 □問題文等は http://blog.spi-gab-cab.net/?eid=747818 ...
![玉を並べる確率[東京大]](https://i.ytimg.com/vi/7wqx41uzWt8/hq720.jpg?sqp=-oaymwE2CNAFEJQDSFXyq4qpAygIARUAAIhCGAFwAcABBvABAfgB_gmAAtAFigIMCAAQARhsIGwobDAP&rs=AOn4CLDf3FhIBmHPnrc-r6EuFWC48NxGWg)
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