Questions tagged [Probability theory] (98)

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How to understand this case of not mutually exclusive events in probability theory?

Welcome! Just started to learn probability theory from scratch. So do not throw complex formulas :D Is seems to be a simple Venn diagram: The Question Is P(A U B) = ? The answer 15% + 55% + 10% = 80% There seems to be an intersection, and at the same time, they are not mutually exclusive, the inclusion of the intersectio...
river.Bradt asked April 16th 20 at 10:11
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Independent of whether the events?

Hi all. There is a task: Let N be a positive random variable with PMF as: p_N(n) = 1/2*n*2^(-n) As soon as we see the numerical value of N, create a random variable with PMF K, uniform on the set {1, 2, ..., 2n}. Question: let A be the event that K is even. Find P(A|N=n) and P(A), i.e. to establish whether the events A and...
Kenyatta_Jacobs asked April 8th 20 at 02:42
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The task about the phone number?

The phone number erased 3 digits. Need to find the probability that among these numbers there is no 1,3 and 5. 343 variant in which no 1 3 and 5? Doesn't add up.
Jaylen_Brown39 asked April 8th 20 at 01:56
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How much you need to spend at least test that all the possible equally likely events are equal?

Let's say I roll the dice. Is there a formula, but certainly is that all the 1, 2, 3 .. 6 when N tests was approximately equal frequency of occurrence, with a certain margin of error. Need to limit loop to generate the number of tests.
Brook.Ankundi asked April 7th 20 at 11:01
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Is it possible to calculate the odds of victory only on the basis of the passed time and the previous coefficients?

Hello, I apologize for maybe stupid question. Write API for interacting with the Bookmaker. Initially, the coefficients will be set by the moderator for each match for some unknown formula. I have only odds and the amount of time elapsed since the beginning of the match at the time with a goal from either side. And the tas...
keven_Corkery asked April 7th 20 at 10:42
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What is the full group of events?

Found two definitions from wiki for example, this "the system of random events such that the result produced by a random experiment will occur one and only one of them. " and other sources you come across "the system of random events such that the result produced by the random experiment will be one of them" That is, in th...
jaiden43 asked April 7th 20 at 08:56
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How to calculate the probability of drift in an online casino mathematically?

There is a slot 5x3 (3 rows), approximately like this: (01) (02) (03) (04) (05) (06) (07) (08) (09) (10) (11) (12) (13) (14) (15) In total there are 11 different options that can fall out (example: A, K, Q, J, 10...). That is, in a series of 11 different options, of which 3 are shown. In a row can't have the same options. H...
arlene_Schroeder asked April 3rd 20 at 23:34
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How to solve it?

At the round table sitting 5 people, find the number of direct links to 2 of them always sat together. Though kill, I can not understand how it is solved... cu Tomorrow, and I child of such a problem can not solve
Velma asked April 3rd 20 at 17:05
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The distribution of percent depending on the price of the case and the things in it?

Hello! I make money opening cases (trunks) for one training project. So, is there a variant where the percentage of loss between the items is distributed evenly, depending on the price of the case (the chest)? For example: Price of case — 50 rubles Things in it: 1 — 10 RUB (30%) 2 — 25 RUB (25%) 3 — 40 RUB (20%) 4 — 50 roub...
Bernadette_Eichmann asked April 3rd 20 at 16:55
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Interesting question from Me! How to solve the problem of those coins?

Not so long ago, the entrance test for an internship I came across the following question:Condition There is a set of 100 unfair pennies from the i-th coin the probability of heads is 1/(2i+1) for (i = 1, 2, ... , 100). The results for each coin are independent. You threw all the coins once, what is the probability that we ...
nadia_Hegma asked April 2nd 20 at 17:22