To make a 1 : 10 dilution, 270 µL of diluent should be added to...

To make a 1 : 10 dilution, 270 µL of diluent should be added to 30 µL of sample, .

A spinal fluid that is slightly hazy is briefly examined microscopically. The technologist performing the count decides to make a 1:10 dilution using 30 µL of sample. What volume of diluent should be used?