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The rules of the game are as following: a player draws one card from a standard 52-card deck. If the player picks a heart, they win $10. If they pick a face card that is not a heart, the player wins $8. Picking a face card heart counts the same as picking a heart. If a player picks another card, they lose $6. Is this gambling game a good way to make money for someone or not?

Respuesta :

LammettHash

Let's suppose "good" here means that the amount a player can expect to win is positive.

The probability of drawing a heart from the deck is 13/52 = 1/4.

The probability of drawing a face card that is not a heart is 9/52.

The probability of drawing anything else is 30/52 = 15/26.

The expected winnings are then 10(1/4) + 8(9/52) - 6(15/26) = 11/26, meaning on average the player can expect to win about $0.42 per game, so by our definition this game is a "good" way to make money.

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