How to find out the original culture of colony forming units if there are too...

arghh

New member
...many colonies to count? How to find out the original culture of colony forming units if there are too many colonies to count? 0.1ml was applied to each plate.
i have counted the colonies on plate d and there are 36 but i have 3 other plates that all have over 300 colonies which is too many to count how can i calculate the original culture?
 
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