Recent questions and answers in Probability - GATE CSE Doubts

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MOCK TESTS GATEFORUM
What is the probability of 3 students sharing a birthday in a class of 30 students is ________ . (A) 0.0300 (B) 0.7029 (C) 0.5604 (D) None of the above

asked Dec 3 in Probability by Dipanshu Rana (24 points) | 7 views

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Made easy test series : Probability
Plz give explaination of above question.

asked Dec 3 in Probability by vishal burnwal (57 points) | 14 views

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Applied course test series:Probability
Out of 10 persons sitting at a round table, three persons A, B and C are selected a random. The chance that no two of these are sitting together is What is the correct answer for above question?

asked Dec 1 in Probability by vishal burnwal (57 points) | 30 views

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Made Easy Test Series: Math
Number of tigers in a reserve is normally distributed with mean and variance respectively as $1200$ and $9\times 10^{4}$. The probability of finding more than $1800$ tiger is approx ___________ They found $\mu +\sigma$ and $\mu -\sigma$ at first. Then calculated $\mu +2\sigma$ and $\mu -2\sigma$ at first. but why , I couldnot understand it. Plz. explain

answered Nov 3 in Probability by pranay562 (666 points) | 60 views

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Self Doubt: Eng. Math
what is median of $max\left ( x,y \right )$? Will it be $0$ or $\frac{x+y}{2}$?

asked Nov 2 in Probability by srestha (558 points) | 20 views

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CSE GATE GURU: MATHEMATICS

answered Oct 27 in Probability by Satbir (3.7k points) | 34 views

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GATE 2014-1-2 (self modified doubt)
Suppose you break a stick of unit length at a point chosen uniformly at random. Then the expected length of the longer stick is ________ My ans is $0.75$ Is this correct?

answered Oct 25 in Probability by Satbir (3.7k points) | 18 views

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Ace Academy Question
Let A and B are two independent events such that P(A)=P(B) and P(A U B)=0.5 then P(A)=?

answered Oct 23 in Probability by Anirban Chand (15 points) | 23 views

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GATE GURU TEST SERIES MATHS
A cancer institute has a testing methodology. The methodology produces 95% positive result, also 10% rate of false-positive(i..e showing a non cancer person as a cancer affected patient). If there are 0.5% of the people have cancer. Suppose a person is classified as a disease affected person, what is the probability that the person is really have cancer? _______________

asked Oct 4 in Probability by Debapaul (308 points) | 25 views

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Standard question but looking for the correct procedure or some different methods

answered Sep 15 in Probability by GAITONDE (1.6k points) | 25 views

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Want to verify the answer. Self Notes
We are given two urns as follows. Urn A contain 5 red marbles, 3 white marbles and 8 blue marbles. Urn B contains 3 red marbles and 5 white marbles. A fair dice is tossed if 3 & 6 appears a marble is chosen from urn B otherwise a marble is ... is the probability that it came from urn A. I don't know the answer. I am getting $\frac{5}{8}$ Please verify.

asked Sep 15 in Probability by `JEET (164 points) | 22 views

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self doubt question, No source of question
a random variable $x$ follows binomial distribution with $mean = 2$ times of variance and $mean + variance = 3$, then $p(x) = 3$ is...

asked Sep 12 in Probability by `JEET (164 points) | 10 views

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Made easy Practice Book
Consider a random variable X that takes values +1 and -1 with probability 0.5 each. The values of the cumulative distribution function F(x) at x=-1 and +1 are A. 0 and 0.5 B. 0 and 1 C. 0.5 and 1 D. 0.25 and 0.75

answered Aug 30 in Probability by GAITONDE (1.6k points) | 15 views

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[GATEBOOK TESTSERIES] What is the expectation of the following event?

answered Aug 29 in Probability by GAITONDE (1.6k points) | 14 views

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A 52 card deck is divided into four hands with 13 cards each. What is the probability that each hand has a queen?

answered Aug 25 in Probability by Satbir (3.7k points) | 22 views

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A draws 2 cards at random from a pack of 52 cards.

answered Aug 24 in Probability by srestha (558 points) | 23 views

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Self doubt- Independent events
In probability, in case of 3 events, why do we need to check pair wise independence rather than just mutual?

asked Jul 28 in Probability by sachin270895 (6 points) | 8 views

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Made Easy Test Series:Mathematics-2
Consider Kuldeep purchase a product of company $X.$ The manual on it states that the lifetime $T$ ... $3rd$ year is __________________ What to use poisson or exponential distribution?

asked Jul 25 in Probability by srestha (558 points) | 17 views

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Sheldon Ross - excercise
Five balls are randomly chosen, without replacement, from an um that contains 5 red, 6 white, and 7 blue balls. Find the probability that at least one ball of each color is chosen.

answered Jul 20 in Probability by Debargha Bhattacharj (1.5k points) | 13 views

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Probability RD SHARMA
A laboratory blood test is 99%effective in detecting a certain disease when it is in fact, present. However, the test also yield a false positive result for 0.5%of the healthy person tested (that is, if a healthy person is tested, then, with ... population actually has the disease, what is the probability that a person has the disease given that his test result is positive?

answered Jul 18 in Probability by Hirak (1.2k points) | 19 views

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self doubts conditional probability
A and B two events such that condition probability P(A|B)=1 then ($B^{c }|A^{c}$) is

answered Jul 11 in Probability by Debargha Bhattacharj (1.5k points) | 22 views

+1 vote

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Ross Chapter 3 Page no-56 Question-2b
A customer visiting the suit department of a certain store will purchase a suit with probability .22, a shirt with probability .30, and a tie with probability .28. The customer will purchase both a suit and a shirt with probability .11 ... will purchase all 3 items with probability .06. What is the probability that a customer purchases exactly 1 of these items?

answered Jul 11 in Probability by Debargha Bhattacharj (1.5k points) | 31 views

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#Total Probability
In a tournament A is in Final, B and C are in semi-final, Probability that B wins semi-final is (1/3) and C wins the semi-final is (2/3), If A vs B then probability that A win is (2/3) and if A vs C then probability that A win is(1/4). What is the Probability that B will win in Final? What is the Probability that C will win in Final?

answered Jul 10 in Probability by Arkaprava (147 points) | 10 views

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conditional probability self doubt
in given probability question how can we assure that , we have to apply here conditional probability P(A/B) or multiplication rule P(A&B)?

asked Jul 2 in Probability by pavitra (6 points) | 12 views

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Sheldon Ross 9e Chapter-3 page no-103 Question-7 & 8

answered Jul 1 in Probability by srestha (558 points) | 24 views

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