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OlympiadBench / 2288 / A bag contains 3 green balls, 4 red balls, and no other balls. Victor removes…

Problem

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

question

A bag contains 3 green balls, 4 red balls, and no other balls. Victor removes balls randomly from the bag, one at a time, and places them on a table. Each ball in the bag is equally likely to be chosen each time that he removes a ball. He stops removing balls when there are two balls of the same colour on the table. What is the probability that, when he stops, there is at least 1 red ball and at least 1 green ball on the table?

answer type

Numerical

is multiple answer

false

language

English

question type

Open-ended

subject

Math

Discussion

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Source and history

upstream_id / Original problem ID
2288
task_id
61a4d71e-5e0a-5d4c-9a83-d20537369c5c
task_key
OE~5fTO~5fmaths~5fen~5fCOMP--train--2288
task_revision_id
4
config / split
OE_TO_maths_en_COMP / train

Official source

initial import