Two unbiased coins are tossed

Two unbiased coins are tossed. What is the probability of getting at most one head?

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 #36284

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