Answer:
[tex]4.3[/tex] CFU/mL
Explanation:
Given -
Dilution factor for sample [tex]= 10[/tex]
Number of colonies produces [tex]= 43[/tex]
Volume of sample before dilution[tex]= 1[/tex]mL
Volume of sample with dilution
[tex]= 1* 10\\= 10[/tex]mL
As we know,
Original concentration of sample is equal to CFU divided by the sample volume.
Thus, original concentration in the sample
[tex]= \frac{43}{10} \\= 4.3[/tex] CFL/mL
