[Tutor] Need more precise digits

[Mike Yuen]

I've trying to calculate an average and it looks like i'm losing some
precision in digits.

For example: i've got the following formula
avgsize = float(totalsize/groups)

both totalsize and groups are integers
I've got 10 groups
sizes are:
2+3+2+2+3+2+2+2+2+2 = 22

I should get 22/10 = 2.2.

What I get is 2.0.  How do I get this missing 2 tenths?  As you can see
from the above, I already casted to a float.

Thanks,
M