Calculating odds against a RANGE

[cboevey]

Errr I'm pretty new at this, but can't you just average your EV figures by putting in one hand at a time? That would be assuming the probability of the opponent holding a specific hand in your range is equal - otherwise you could multiply your EV by the probability of the opponent holding that specific hand as long as the probabilities for your range sum to 1.

The difficulty with a tool would be to define what is in a range.