Question: A water sample from which 10, 1, and 0.1 ml/100mL dilutions resulted in 5, 4 and 3 positive lactose-fermentation tubes, respectively. Determine the MPN/100 mL

A water sample from which 10, 1, and 0.1 ml/100mL dilutions resulted in 5, 4 and 3 positive lactose-fermentation tubes, respectively. Determine the MPN/100 mL through finding the maximum value of y*a. .

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