Sample space and bridge game

In summary, the events mentioned involve the number of aces in possession of North, South, East, and West players. The prime symbol indicates the absence of aces, while two symbols together indicate the presence of aces. The union sign represents either/or and the minus sign represents one statement being true while the other is false. The numbers of aces in West's possession in each event are 0, 1, 2, and 4 respectively. These events may be confusing, but understanding the symbols used can help in answering the questions.
  • #1
WMDhamnekar
MHB
376
28
Bridge : For k= 1,2,3 ,4 let $N_k$ be the event that North has at least k aces. Let $S_k, E_k, W_k$ be be the analogous events for South, East, West. Discuss the number x of aces in West's possession in the events
a)$W_1', $
b) $N_2S_2,$

c) $N_1'S_1'E_1'$
d) $W_2- W_3$
e)$N_1S_1E_1W_1$

f) $N_3 W_1$
g)$(N_2 \cup S_2)E_2$

How to answer these questions? Truly speaking, I didn't follow these events. Would any member of math help board answer these questions along with explanation of these events?
 
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  • #2
It helps to know the symbolism. In symbolic logic the prime, ', indicates that the statement is NOT true. Since we are told that \(\displaystyle W_1\) means "West has at least one ace", \(\displaystyle W_1'\) means "West does NOT have at least one ace". I.e. West does not have any aces.

Symilarly, two symbols written together indicate that they are both true. \(\displaystyle N_2S_2\) means that "North has two at least aces and South has at least two aces".

The union sign, \(\displaystyle \cup\), indicates "either or". \(\displaystyle (N_2\cup S_2)E_2\) means "Either North has at least two aces or South has at least two aces, and East has at least two aces.

Finally A- B means that statement A is true but statement B is false. \(\displaystyle W_2- W_3\) means "West has at least two aces but West does not have at least three aces". I.e., West has exactly three aces.

Now you try the others.
 
  • #3
County Boy said:
Finally A- B means that statement A is true but statement B is false. \(\displaystyle W_2- W_3\) means "West has at least two aces but West does not have at least three aces". I.e., West has exactly three aces.

The last sentence should have been "West has exactly TWO aces".
 
  • #4
County Boy said:
The last sentence should have been "West has exactly TWO aces".
The number x of aces in West's possession in the event $(a)W_1', (b)N_2S_2, (g)(N_2 \cup S_2)E_2$ is = 0.

The number of aces in West's possession in the event $(e) N_1S_1E_1W_1, (f)N_3W_1$ is = 1.

The number of aces in West's possession in the event $(d)W_2- W_3$ is = 2.

The number of aces in West's possession in the event $(c) N_1' S_1'E_1'$ is = 4.
 

1. What is a sample space in the context of bridge game?

A sample space in bridge game refers to the set of all possible outcomes or combinations of cards that can be dealt to players during a game. It includes all the different ways in which the 52 cards in a deck can be distributed among the players.

2. How is the sample space determined in bridge game?

The sample space in bridge game is determined by considering all the variables that can affect the distribution of cards, such as the number of players, the rules of the game, and the number of cards dealt to each player. It can also be calculated using mathematical principles and probability theory.

3. Why is understanding the sample space important in bridge game?

Understanding the sample space in bridge game is important because it helps players make informed decisions and develop strategies based on the likelihood of different card distributions. It also allows for the calculation of probabilities and can help predict the outcome of a game.

4. Can the sample space change during a bridge game?

No, the sample space in bridge game remains constant throughout the game. However, as cards are played and removed from the deck, the sample space of remaining cards may change, affecting the probability of certain card combinations.

5. How does the sample space differ in different variations of bridge game?

The sample space may differ in different variations of bridge game due to variations in the number of players, the number of cards dealt, and the rules of the game. For example, in duplicate bridge, where players are dealt the same cards as their opponents, the sample space is smaller compared to rubber bridge, where players are dealt different cards.

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