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Start learning 50% faster. Sign in nowAccording to the question, Total work to be done = (3/4) × 35 × 14 × 9 = 3307.5 units. For I: Number of typists = 30 Desired number of hours = 3307.5/(11 × 30) = 10.02 hours So, ‘I’ cannot be true. From II: Number of typists = 45 Desired number of hours = 3307.5/(11 × 45) = 6.75 hours So, ‘II’ can be true. From III: Number of typists = 40 Desired number of hours = 3307.5/(11 × 40) = 7.5 hours So, ‘III’ cannot be true.