Question 1180090
i think it will be .8 * 2 + .2 * 5 = 1.6 + 1 = 2.6.
that would be selection b.


the idea is that 80% of the time A will win and 20% of the time B will win.


if the teams played 100 games, then team A would win 80 games and team B would win 20 games, assuming the probabilities held true.


to cover the cost of of rebating the bet, then 2 * 80 = 160 is returned when team A wins and 5 * 20 = 100 is returned when team B win.   that's a total of 160 + 100 = 260 that's returned for the 100 games.
divide that by 100 to get an average of 2.60 returned for each game played.