Here is how you can average winning over 60% of your sessions, guaranteed. Play roulette. Specifically, bet whatever denomination you're comfortable with on one individual number 34 times and then quit. It doesn't matter which number, and it doesn't matter if you switch numbers.
During this 34 spin session, your chances of losing every single spin: (37/38)^34 = .40, meaning your chance of winning at least one spin: 1 - .40 = .60, or 60%. And if you win just one spin out of 34, you are guaranteed to be a winner for the session. So you in the long run, you can expect to win six out of ten sessions. Isn't that great?
Of course this is a negative 5.3% expectation play, so while you're winning lots of sessions, you'll be losing lots of money. So much for caring about winning sessions, huh?
During this 34 spin session, your chances of losing every single spin: (37/38)^34 = .40, meaning your chance of winning at least one spin: 1 - .40 = .60, or 60%. And if you win just one spin out of 34, you are guaranteed to be a winner for the session. So you in the long run, you can expect to win six out of ten sessions. Isn't that great?
Of course this is a negative 5.3% expectation play, so while you're winning lots of sessions, you'll be losing lots of money. So much for caring about winning sessions, huh?