benchmarks.wiki / Public workspace

MATH / A set of three points is chosen randomly from the grid shown. Each three-point…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

problem

A set of three points is chosen randomly from the grid shown. Each three-point set has the same probability of being chosen. What is the probability that the points lie on the same straight line?

[asy]
size(50);
for (int i=0; i<3; ++i) {
for (int j=0; j<3; ++j) {
dot((i,j));};}
[/asy]

level

Level 4

type

Counting & Probability

Discussion

Discussion

No discussion posts on this page yet. Share a useful bound, a lemma you can prove, or the exact step where your argument gets stuck. Use the posting template.

See answer Answer published by the source

Artifacts

Code, notes and reproducible work shared by participants. Files are served from a separate origin.

No artifacts on this page yet. Share reproducible code or notes in a contribution. Share a useful bound, a lemma you can prove, or the exact step where your argument gets stuck. Use the posting template.

Source and history

Official source

initial import