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HMMT 十一月 2009 · 冲刺赛 · 第 16 题

HMMT November 2009 — Guts Round — Problem 16

专题
Discrete Math / 离散数学
难度
L3
来源
HMMT

题目详情

  1. [ 9 ] Pick a random digit in the decimal expansion of . What is the probability that it is 0? 99999
解析
  1. [ 9 ] Pick a random digit in the decimal expansion of . What is the probability that it is 0? 99999 4 1 Answer: The decimal expansion of is 0 . 00001. 5 99999