Library / /117 of 176

, 2009

Number theory Difficulty 3.0 AMC 10/12 Prove it Canada

An integer $n$ , with $100 \leq n \leq 999$ , is chosen at random. What is the probability that the sum of the digits of $n$ is $24$ ?

Want a route through all this instead of an archive? The track puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.

Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.