What is the dilution of river water present in tube

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Suppose someone starts a broth culture of E. coli at an initial concentration of 5,000 cfu/mL. They prepared river samples as follows:

Tube A: 0.1 mL river water mixed with 99.9 mL of sterile water

Tube B: 1 mL of A mixed with 99 mL of sterile water

Tube C: 1 mL of B mixed with 9 mL of sterile water

Tube D: 1 mL of C mixed with 9 mL of sterile water

Tube E: 1 mL of D mixed with 9 mL of sterile water

What is the dilution of river water present in each tube?

Reference no: EM132797310

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