Hello trevman
Try this:
your 1.example ((100 * 2) + (100 * 1.5)) / (100 + 100) = 1.75
the 2. ((200 * 1.5) + (50 * 1.3)) / (200 + 50) = 1.46
and the 3. ((100 * 100) + (100 * 50)) / (100 + 100) = 75
for the 3. it is not 66 because otherwise 100-(100-66) had to be 50.
and by having more stakes : ((price*inv)+(price*inv)+(price*inv)) / (inv+inv+inv)
and so on.
Yes, its always a little bit tricky with the math.Your 66 had brought me initially to calc the so called Harmonic Mean
http://mathworld.wolfram.com/HarmonicMean.html but had led me on a wrong track. For hours...damned.
Btw maybe later on you want to check out also the Supermartingale with your
spreadsheet calcs.I would be curious to see the outcomes.
hbud