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初二版
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第583期
SCHOOL TIME
Young math genius
初二
第583期
作者:TEENS
Aa
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厉害了!美国数学竞赛冠军0.9秒内解出题目。
On a farm, 100 chicks sit quietly in a circle. Suddenly, each chick freely pecks (啄) the chick to its left or right. What is the expected number (数目) of unpecked chicks? Can you solve it? (See explanation at the end of the story.)
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