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a) $${\text{5}}\frac{6}{{13}}{\text{ months}}$$ b) $${\text{6 months}}$$ c) $${\text{5}}\frac{7}{{13}}{\text{ months}}$$ d) $${\text{11}}\frac{1}{{13}}{\text{ months}}$$ Answer: d Explanation: 40 men ...

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