Lemma
MediumRatio, proportion & variation
AQuA-RAT train #24929 · Algebra · Ratio, proportion & variation

A movie buff owns movies on DVD and on Blu-ray in a…

A movie buff owns movies on DVD and on Blu-ray in a ratio of 7:2. If she buys 5 more Blu-ray movies, that ratio would change to 13:4. If she owns movies on no other medium, what was the original number of movies in her library before the extra purchase?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #24929

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