Yes, the expected value of the bankroll growth in absolute numbers. BG and PG are random variables.
"Expected value of the bankroll growth in absolute numbers" - crazy confusing wording.
There are "expected value" and "expected growth".
Do you know what a random variable is? Do you know what the expected value of a random variable is? I'm not talking about the expected value of the
bet, I'm talking about the expected value of the
bankroll growth.