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One ml of a bacterial culture was pipetted into a 9 ml diluent. One-tenth ml of this dilution was pipetted into a 9.9 ml diluent. From this dilution, one-tenth ml was plated on enriched agar. 220 colonies were counted after 24 hour incubation. How many colony-forming units were present per ml in the original culture?

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Category:- Biology
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