Odd sum has a O/E ratio of 3/3, 1/5 or 5/1

Even sum has a O/E ratio of 2/4, 4/2, 0/6 or 6/0

So, if you filter for an odd sum hitting, then your O/E ratio will AUTOMATICALLY be 3/3, 1/5 or 5/1. You can't filter for an odd sum and an O/E ratio of 2/4. If you have any inclinations that your O/E may hit 2/4 or other even ratio as well as an odd ratio, then filter for the O/E and not the SUM being either odd or even. In other words, if you're not sure then don't eliminate it.

Does your 6/49 work this way as well?