Averaging discrete variables

I'm doing some data analysis for an experiment that I conducted involving serial dilutions.

Because of the nature of the experiment, my variable of interest (MIC), can take on discrete values of:

15, 7.5, 3.75... 15/(2^i) where i = 0, 1, ..., n.

Now, I'm a little confused. I have done triplicates of the experiment, and I was about to average the data. But I'm not sure if it makes sense to average discrete values such as these (I'm ok averaging discrete values of 1,2,3,4 etc.)

Let's say I get values of 7.5, 3.75, and 3.75. Does averaging it even make sense?

Hope someone can help me. I've been trying to figure it out. Thanks!