Track / Stage 1 / 8 of 320 #8 of 2604

Problem 8

Combinatorics Difficulty 1.0 Find the answer CEMC Gauss (Grade 8) · Canada · 2006

There are $2$ red, $5$ yellow and $4$ blue balls in a bag. If a ball is chosen at random from the bag, without looking, the probability of choosing a yellow ball is

(A) $\frac{2}{11}$ (B) $\frac{5}{11}$ (C) $\frac{4}{11}$ (D) $\frac{6}{11}$ (E) $\frac{7}{11}$

The source for this one didn't record the answer, so there is nothing to check what you type against. Work it on paper and mark yourself against the solution below.

We don't reproduce this publisher's solutions. Their own solution is here — work the problem first.

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