Casinos advertise a 95% payback for their slot machines. This means that for a $1 stake, a gambler can expect to get 95 cents back. a) What does 95% payback mean in terms of the expected value of a play on the slot machines? i.e. What is the expected value of a pull on the slots? b) How does this compare to choosing ‘black’ or ‘17’ on roulette or playing Keno? Which is the best bet?