olymmath

AMC 10 2021-fall-b Problem 23

  • Paper

Each of the 55{ } sides and the 55{ } diagonals of a regular pentagon are randomly and independently colored red or blue with equal probability. What is the probability that there will be a triangle whose vertices are among the vertices of the pentagon such that all of its sides have the same color? (A) 23(B) 105128(C) 125128(D) 253256(E) 1(\textbf{A})\: \frac23 (\textbf{B}) \: \frac{105}{128} (\textbf{C}) \: \frac{125}{128} (\textbf{D}) \: \frac{253}{256} (\textbf{E}) \: 1

Dataset text NuminaMath-1.5. Quoted with source.

Show the answer

\frac{253}{256}

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 amc10/2021-fall-b/p23 · Tag ERRK0QRM1A · Edit this page on GitHub · Keys: j next, k previous