olymmath

AMC 10 2021b Problem 18

  • Paper

A fair 66-sided die is repeatedly rolled until an odd number appears. What is the probability that every even number appears at least once before the first occurrence of an odd number? (A) 1120(B) 132(C) 120(D) 320(E) 16\textbf{(A)} ~\frac{1}{120} \textbf{(B)} ~\frac{1}{32} \textbf{(C)} ~\frac{1}{20} \textbf{(D)} ~\frac{3}{20} \textbf{(E)} ~\frac{1}{6}

Dataset text NuminaMath-1.5. Quoted with source.

Show the answer

\frac{1}{20}

Solutions

No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.

Add a solution

Similar problems

These problems have the most words in common with this statement.

Locator amc10/2021b/p18 · Tag V9HM32EEGP · Edit this page on GitHub · Keys: j next, k previous