To determine: The prize for drawing the ace of diamonds.
The prize for drawing the ace of diamonds is $75.
Given information:
The game is considered as a fair game when the expected value is 0.
Pay the $5 for draw a card from a deck.
If it’s black, you lose.
If it’s a heart, you win your $5 back.
If it’s any diamond except the ace, you win $10.
Formula used:
Here, E is the favourable outcomes and S is the total possible outcomes.
Calculation:
A standard deck of cards contains 52 cards, of which 26 are red and 26 are black, 13 are of each suit (hearts, diamonds, spade, clubs) and out 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 a black card is drawn, then lose the $5 that draw a card 26 of the 52 cards in the deck of cards are black.
Substitute 26 for
When a heart is drawn, then win our $5 back and thus a payoff of $5-$5 = $0.
13 of the 52 cards in the deck of cards are hearts.
Substitute 13 for
When a diamond is drawn that is not the ace of diamonds, then win $10 while already paid $5 to draw a card and thus, a payoff of $10-$5 = $5.
12 of the 52 cards in the deck of cards are diamonds but not the ace of diamonds.
Substitute 12 for
Let the prize of drawing the ace of diamonds be
It costs $5 to draw a card, we would then have a payoff of
1 of the 52 cards in the deck of cards is the ace of diamonds.
Substitute 1 for
Now,
The expected value (or mean) is the sum of the product of each possibility x with its probability P(x):
Substitute
For the fair game, the expected value should be 0.
Thus, the prize for drawing the ace of diamonds is $75.
Chapter 10 Solutions
PRECALCULUS:GRAPHICAL,...-NASTA ED.
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