What percentage of numbers from 1 to 60 have 1 or 9…

What percentage of numbers from 1 to 60 have 1 or 9 in the unit's digit?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #73527

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