To calculate: The expected value of the payoff and find for the play of this game need to pay $5 or not.
The expected value of the payoff is -$0.77 and for play this game no need to pay any amount.
Given information:
For $5, a carnival huckster will let you draw a card at random from a fair deck of 52.
He will pay you a dollar times the value of your card (ace = 1), but zero for a face card.
Formula used:
Here, E is the favourable outcomes and S is the total possible outcomes.
Calculation:
A standard deck of cards contains 52 cards, out of which 26 are red and 26 are black, 13 are of each suit (hearts, diamonds, spades, clubs) and of which 4 are of each denomination (A, 2 to 10, J, Q, K). The face cards are the jacks J, queens Q and kings K.
When drawing a face card, then the payout is $0 while it costs $5 to draw a card and thus, make a loss of $5.
3·4=12 of the 52 cards in the standard deck of cards are face cards.
Substitute 12 for
When drawing a non-face card with value x, then the payout is $x while it costs $5 to draw a card and thus, make a profit of $x-$5.
4 of the 52 cards are non-face cards with value x.
Substitute 4 for
Now,
The expected value (or mean) is the sum of the product of each possibility x with its probability P(x):
Substitute
Hence, the expected value of the payoff is -$0.77 and for play this game no need to pay any amount.
Chapter 10 Solutions
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