cell concentration /dilution problems

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jsnts's picture
cell concentration /dilution problems

I am having some problems with determing the cells concentration.

To start i have some cells with a concentration of 9.7 x107/ml.
I took 2ml of these cells and added 1ml of media to them.
What is the concentration?

If i then take iml of the above diluted cells and add a further 0.5ml of media what is the concentration of these cells now?