Difference between revisions of "2023 SSMO Relay Round 4 Problems/Problem 3"

(Created page with "==Problem== Let <math>T=</math> TNYWR. <math>N+1</math> numbers are chosen from the set <math>\{1,2,3,\dots,N+1\}</math> with replacement. If the probability that the median o...")
 
 
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==Problem==
 
==Problem==
Let <math>T=</math> TNYWR. <math>N+1</math> numbers are chosen from the set <math>\{1,2,3,\dots,N+1\}</math> with replacement. If the probability that the median of these <math>N+1</math> numbers is greater than <math>\frac{N+2}{2}</math> is <math>M,</math> such that the decimal representation of <math>\frac{1}{M}</math> has <math>a</math> <math>0</math>'s before the first nonzero digit of it, find <math>n</math> rounded to nearest multiple of <math>5.</math>
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Let <math>T=TNYWR</math>. <math>N+1</math> numbers are chosen from the set <math>\{1,2,3,\dots,N+1\}</math> with replacement. If the probability that the median of these <math>N+1</math> numbers is greater than <math>\frac{N+2}{2}</math> is <math>M,</math> such that the decimal representation of <math>\frac{1}{M}</math> has <math>a</math> <math>0</math>'s before the first nonzero digit of it, find <math>n</math> rounded to nearest multiple of <math>5.</math>
  
 
==Solution==
 
==Solution==

Latest revision as of 19:19, 2 May 2025

Problem

Let $T=TNYWR$. $N+1$ numbers are chosen from the set $\{1,2,3,\dots,N+1\}$ with replacement. If the probability that the median of these $N+1$ numbers is greater than $\frac{N+2}{2}$ is $M,$ such that the decimal representation of $\frac{1}{M}$ has $a$ $0$'s before the first nonzero digit of it, find $n$ rounded to nearest multiple of $5.$

Solution