best probability books

Design mode of the item drop probability table: PHP mysql The younger brother posted the post for the first time ~ Drop probability table Id item id adventure activity copy battle... 1 5 8 10 12 14 2 7 15 5 20 0 3 9 20 0 30 0 The probability that an item (item id) drops in an action (such as adventure or copy) Can I create this table like this? How to write P

Test instructions: A , b throw the dice, for each of the points of the big wins, flat for and, a first win m times a won, the second wins n times b win. WA so many times this problem data is wrong, two people's blood is mistaken, the amount of the input of a is actually B, the input B is actually a, because of the interference of the draw phenomenon, so the first draw included in a win probability B win probabilities are calculated out, And then minus

that it's a transpose of the original matrix.This time let b1,b2,b3 distribution reverse output, that is, output B1[::-1],B2[::-2],B3[::-3], obviously, the result is a clockwise rotation of 90° resultsSimilarly, if a nested list is passed in, the result can be output by means of a *, for example:Zip (*[(1, 4, 7), (2, 5, 8), (3, 6, 9)]) Zip (*[[1, 4, 7], [2, 5, 8], [3, 6, 9]])The output results are:[(1, 2, 3), (4, 5, 6), (7, 8, 9)]This very abstract function also has a magical magic----randomly

(expect the farmers to get the right to license ...) The number of hands above both can walk the card and high top of the 2 to do "can go Card hand not put", there are aaa,222 licensing the crossroads to do "Choose the landlord as small as possible probability" The above example can also be regarded as a loss of the game after the re-disk, why the top 2, and not the top K, any step of the card can be found, this re-disk is practical meaning that the

Topic Link:http://uva.onlinejudge.org/index.php?option=com_onlinejudgeitemid=8page=show_problem problem=1962 The main topic: give you k a hair ball, each hair ball can only survive one day, but each hair ball has pi probability multiply I a hair ball, ask the probability of death of all hair balls in M days. (All wool balls are independent and non-existent) Problem-solving ideas: first, because each hair ba

Recently re-read a bit of probability theory, feel a lot of things are forgotten, but also into a variety of misunderstandings, hurriedly corrected back.The main contents of probability theory include:events, conditional probabilities, random variables, distribution functions of random variables, probability densities, union distributions, expectations, variances

Random Variable A random variable is different from a common data variable. It is usually expressed in uppercase letters, such as X, Y, and Z. It is not a parameter but a function, that is, a function. For example, the random variable X indicating whether it is raining tomorrow is shown below. For example, if X = is a vehicle passing through an intersection every hour, a random variable is a description rather than a variable in the equation. There are two types of random variables: discrete an

A logical question that has aroused national debate among college students across the country: Suppose you are playing a game program. Now you can choose from three doors: one door is behind a car, and the other two are behind a goat. Of course you want to get a valuable car, but you cannot see the real situation behind the door. The host asks you to make the first choice. After you select a door, you will know the host behind the other two doors and open another door to show you. And, of course

Oracle If you go to a computer bookstore now, you'll find that books related to Oracle technology will occupy a lot of space in bookstores. In these books there are many fine, but certainly some dross mixed with, for fine, we might as well read, for those patchwork of books we still avoid and far, lest let oneself regret. Here, fenng to write down the impression

This article mainly introduces a lottery program. The probability of winning the first prize is 0.12%, the probability of winning the second prize is 3%, the probability of winning the third prize is 12%, and the probability of winning other prizes is thank you for your patronage. This article mainly introduces a lott

Description ProblemTribblesInput:Standard Input Output:Standard output Gravitation,N."The tendency of all bodies to approach one another with a strengthProportion to the quantity of matter they contain -- the quantityMatter they contain being ascertained by the strength of their tendencyTo approach one another. This is a lovely and edifying authenticationHow science, having made a proof B, makes B the proof of ." Ambrose Bierce You have a populationKTribbles. This participates spe

Learning point probability new share 08:10:23Author:Source: Beijing News In addition to praying for good luck, investors who enter the intensive new phase may also wish to learn some tips to improve the signing rate. Probability1] Shanghai, Shanghai, and Shenzhen Difference in signing Rate5Times According to the distribution of the signing rate in the history of online purchase, the signing rate in Shanghai is similar to that in Shenzhen5Times. Statis

Activation Time Limit: 20000/10000 MS (Java/others) memory limit: 32768/32768 K (Java/Others)Total submission (s): 1332 accepted submission (s): 501 Problem descriptionafter 4 years 'waiting, the game "Chinese Paladin 5" finally comes out. tomato is a crazy fan, and luckily he got the first release. now he is at home, ready to begin his journey. But before starting the game, he must first activate the product on the official site. there are too when passionate fans that the activation server ca

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Test Instructions: ACM Competition, a total of M, T team, Pij said that team I solved the probability of the J question, ask each team to solve at least one problem and the champions team at least solve the probability of the n problem.Analysis: Probability dp,dp[i][j][k] represents the first team, the first J, the probabilit