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Mostly Smoky are Burner → Some Smoky are Burner. Hence conclusion I does not follow. Only a few Fried are Smoky → Some Fried are Smoky. Hence conclusion II does not follow. Only a few Fried are Smoky (I) + Mostly Smoky are Burner (I) → No conclusion. Hence conclusion III does not follow.
A is five times as efficient as B and can finish a piece of work in 24 days less than B. B can finish this work in how many days?