After incubation, 86 colonies were counted on the 10-7 dilution plate. Only 0.1 ml was spread on the plate. What was the count in the original undiluted culture?
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Step 1
Since 0.1 ml was spread on the plate, this represents 1/10 of the original 1 ml sample. Therefore, the dilution factor is 10^-1. Show more…
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