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9 October, 00:26

If a gambler rolls two dice and gets a sum of 10, he wins $10, and if he gets a sum of three, he wins $20. the cost to play the game is $5. what is the expectation of this game?

a. $3.06

b. - $2.78

c. - $3.06

d. $2.78

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Answers (1)
  1. 9 October, 00:40
    0
    Chance to win $10 is 3/36 Chance to win $20 is 2/36 Chance to lose is 31/36 So if cost of play is $5: ((3*5) + (2*15) - (5*31)) / 36 = - 3.06 C. $-3.06
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