Every student in a certain classroom was given one colored marble

Every student in a certain classroom was given one colored marble. 1/2 of the students were given a blue marble, 1/3 of the students were given a yellow marble, and all of the other students were given a red marble. After lunch, 1/3 of the students who had blue marbles and 1/4 of the students who had yellow marbles left the classroom; the other students did not leave. What fraction of all students have either a blue or yellow marble now?

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #7436