Expert answer:A plate has 72 colonies with a total dilution fact

  

Solved by a verified expert:calculate the original cfus in your original broth tubeA plate has 72 colonies with a total dilution factor of 107, what was the original cf. concentration of that samplehow do you know if you have a countable plate when doing a dilution seriestwo plates received 100l of the same dilution tube.The first has 293 colonies and the second has 158 colonies. suggest a reasonable reason why this happened.

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