Calculate the cfu ml in the original water sample

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Reference no: EM132352615

0.1ml of a water sample from Lake Chabot was added to 9.9ml of sterile water. This was mixed well and further diluted by 4 serial 1:10 dilutions. 1.0ml of each dilution was plated on a nutrient agar plate. After incubation, colonies on each plate were counted and the results are shown below:

Dilution tube Amount plated # of colonies

1 1ml 2341

2 1ml 892

3 1ml 240

4 1ml 18

5 1ml 1

Calculate the CFU/ml in the original water sample, based on the above data. which plate should you choose?

Reference no: EM132352615

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