"The Drunkard's Walk" by Leonard Mlodinow と言う確率の本を読み始めましたが、その中に面白い話が出ていたので紹介します。
My dad heard this story on the radio.
At Duke University, two students had received A's in chemistry all semister. But on the night before the final exam, they were partying in another state and didn't get back to Duke until it was over. Their excuse to the professor was that they had a flat tire, and they asked if they could take a make-up test.
The professor agreed, wrote out a test, and sent the two to separate rooms to take it. The first question (on one side of the paper) was worth five points. Then they flipped the paper over and found the second question, worth 95 points: "which tire was it?"
What was the probability that both students would say the same thing? My dad and I think it's 1 in 16. Is that right?
中々粋な教授ですが、二人の学生のタイヤのパンクが口実だった場合、追試のタイヤ問題で二人が同じ答えを出す確率は幾つでしょうか？
P.S. 上記は３月１２日に趣味人倶楽部の「不明なエイゴ&ステキなエイゴ」コミュニティに投稿したのですが、その日に東北で地震・津波が発生したせいか誰も読んでくれない様でした。 しかし私はとても興味を覚えた話なので再度ここで紹介しています。
My dad heard this story on the radio.
At Duke University, two students had received A's in chemistry all semister. But on the night before the final exam, they were partying in another state and didn't get back to Duke until it was over. Their excuse to the professor was that they had a flat tire, and they asked if they could take a make-up test.
The professor agreed, wrote out a test, and sent the two to separate rooms to take it. The first question (on one side of the paper) was worth five points. Then they flipped the paper over and found the second question, worth 95 points: "which tire was it?"
What was the probability that both students would say the same thing? My dad and I think it's 1 in 16. Is that right?
中々粋な教授ですが、二人の学生のタイヤのパンクが口実だった場合、追試のタイヤ問題で二人が同じ答えを出す確率は幾つでしょうか？
P.S. 上記は３月１２日に趣味人倶楽部の「不明なエイゴ&ステキなエイゴ」コミュニティに投稿したのですが、その日に東北で地震・津波が発生したせいか誰も読んでくれない様でした。 しかし私はとても興味を覚えた話なので再度ここで紹介しています。
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