benchmarks.wiki / Public workspace

MATH / A blue plane, a red plane and a white plane are waiting to take off from an…

Problem

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

problem

A blue plane, a red plane and a white plane are waiting to take off from an airport that has two runways. Planes must take off from the airport one at a time, but can take off from either runway. In how many ways can the three takeoffs be scheduled? (One such way is the blue plane on runway A, followed by the red plane on runway B, followed by the white plane on runway B.)

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