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A free bet on the odds of -400 is likely to succeed 80% of the time and will get you a .5 profit, so the expected value is just (80% * .50). On the other hand, the same bet on the odds of +1000 pays out 0 profit with the probability of 9.09%, meaning the expected value is .09 (9.09% * 0). nomor hk togel online