There are 13 cards of clubs, and if you draw one at random, there are several possibilities What is

There are 13 cards of clubs, how many possibilities are there to draw one? What are the likelihoods of each one?

A total of 13 cards.

There are 13 possibilities.

There is no duplication of each card.

p (touch any one) = 1 13

Marking the 6 faces of a small cube with numbers so that the probability of 3 facing up is 1 in 3, how many solutions can you come up with?

There are 6 faces, and the probability of 3 is 1 3

The faces marked with three have 6 1 3 = 2.

There are 13 possibilities, each of which is 1 out of 13

On the 6 faces of the cube there are and two of them have the number 3

1.There are 13 possibilities, and the probability of each is 1 in 13

2.Label 3 on both faces, and mark 3 on all other faces except 3. Because one-third is two-sixth.

There are 13 cards of clubs, and there are 13 possibilities to draw one? The probability of each is 1 out of 13

Label each of the 6 faces of a small cube with a number so that the probability of 3 facing up is 1 in 3, then 3 has two!

1.There are 13 possibilities, and each one has a 13 chance of being 13 likely.

2.I was thinking about it, too, but I didn't come up with it.

You're in the fifth grade, right?

1. There are 13 possibilities, and the probability of each card is 1 in 13.

2. Write the number 3 on two of the sides

1.13 possibilities, each of which is 1 in 13.

2 Three.

13 cards of each suit, I type tease the first calculation of the opposing event Gao Yan is the probability of plum blossoms.

So it's not all 38 41,2,1-13*12 (52*51)=quedign,2, first find the probability that both are clubs (13*12) (52*51)=1 17 and then subtract 1 to get 16 17,2,p=1-p (all clubs) ,2,1-13*12 (52*51)=

A deck of cards without a big or small king is 52 cards!! Bu sell, 2, 75%, 0, 42%, 0,

Club probability: 13 54

Block Probability Shirt Width: 13 54

The probability of getting a dull plum or a square collapsed bend is 26 54

The number of times a three-card burns a duan of the same suit = 4 (13c3) (39c4) has a probability of having three suits.

4(13c3)(39c4) 52c7where ncr = n!/r!(n-r)!

If you put it back, it should be 12 13 * 11 13.

Explanation: The first card can be drawn whatever you want. So the probability is 1Then put it back, and the second card can only draw the other 12 cards. So it's 12 13 and the third one has only 11 left. So it's 11 13.

The origin of playing cards

One theory was invented by the Tang Dynasty astronomer Zhang Sui, and it was originally called "leaf play" because the cards were only the size of leaves. The Song Dynasty writer Ouyang Xiu also recorded the "leaf opera" in the "Returning to the Fields", which was developed from a play on words. In the Yuan Dynasty, Marco Polo traveled to China, held official positions in the Chinese court for a long time, and had a close relationship with the upper class intellectuals.

Learned the game. Later it spread to Europe. In the beginning, it was only a luxury for the aristocracy, but because of its low cost, variety of gameplay, and easy to learn, it soon became popular among the people.

According to their own culture and traditions, Europeans improved the card game, which eventually led to the emergence of "playing cards".

There is also a saying that according to legend, as early as the end of the Qin Dynasty, during the Chu and Han wars, the general Han Xin invented a card game in order to alleviate the homesickness of the soldiers, because the card is only the size of a leaf, so it is called "leaf play". (Leaf card", two finger sizes.) The "leaf plaque" 8 cm long and 2 5 cm wide is framed on silk and paper, and the pattern is printed on a woodblock plate).

It is said that this was the beginning of playing cards. Playing cards have a history of change over hundreds of years. The earliest Western solitaire flowed into Europe from Asia during the Crusades in the 13th century, and there were only Chinese solitaire in Asia at that time, so the development of Western solitaire has a certain relationship with the spread of China's horse tags.

In the 16th century, a kind of card called "winning hand" was popular in the West, which evolved into a whist card game similar to bridge in the early 17th century, popular in London, England and the Netherlands, and in 1894, bridge was produced in the London club in England, and this bridge evolved into the current playing card.

As a kind of Western solitaire, the design scheme of playing cards also contains endless knowledge. It is designed according to the calendar, and in a sense, poker can be said to be the epitome of the calendar.

Later, this divination tool evolved into a toy, and its divination function gradually faded and was forgotten.

The above content reference: Encyclopedia - Playing Cards.

Take three cards without repeating: c(1,13)*c(1,12)*c(1,11).

Divide by three times for all cases c(1,13), c(1,13), c(1,13).

13*12*11 13 13 13, probability approx.

If you put it back, it should be 12 13 * 11 13.

Interpretation. The first one can be drawn whatever you want. So the probability is 1Then put it back, and the second card can only draw the other 12 cards. So it's 12 13 and the third one has only 11 left. So it's 11 13.

Solution: First of all, it is clear that all possible methods are 13 13 13 = 2197.

The three completely different ways to take them are 13 12 11 = 1716 kinds (the first one has 13 ways to take them, and they can't be repeated later, in order).

The probability of all differences is 1716 2197 = 132 169, three cards are all the same, 13 kinds of takes, the probability is 13 2197 = 1 169, then the probability of not being exactly the same is 1-1 169 = 168 169 hope to adopt.