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As a decimal, what is the value of $\dfrac{1}{9} + \dfrac{1}{11}$?

(A) $0.10$ (B) $0.20$ (C) $0.2020$ (D) $0.202\,020$ (E) $0.\dot{2}\dot{0}$

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Source: UK Mathematics Trust, licensed © UK Mathematics Trust; past papers published free at ukmt.org.uk. Statement reproduced verbatim; metadata (topic, difficulty, ordering) added by this project. Solutions are the publisher's, linked not copied.