現在題很難。這是第29題

來源: 於 2024-12-25 20:54:23 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

Stephanie rolls three standard dice. What is the probability that the product of the three numbers she rolled is not a multiple of 8? Express your answer as a common fraction.

我後來花了20分鍾才做出來: by casework.