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a) $$\frac{1}{4}$$ b) $$\frac{1}{{10}}$$ c) $$\frac{7}{{15}}$$ d) $$\frac{8}{{15}}$$ Answer: d Explanation: $$\eqalign{ & {\text{A's}}\,{\text{1}}\,{\text{day's}}\,{\text{work}} = \frac{1}{{15}} ...

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