What would be the original concentration in a solution when we performed one 1 to 1000 dilution and two 1 to 2 dilutions then plated 100 microliters

What would be the original concentration in a solution when we performed one 1 to 1000 dilution and two 1 to 2 dilutions then plated 100 microliters of the final dilution on a plate and saw 80 bacterial colonies grow on it the following day? 

 

"Looking for a Similar Assignment? Get Expert Help at an Amazing Discount!"