Recent questions tagged probability - GATE CSE Doubts

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linear algebra and prob for Interviews
I am not able to know how much linear algebra and probability to study for the upcoming interviews. right now I am studying these: Sir Gilbert Strang videos on YT for linear algebra Khan academy videos on YT for probability so is this OK or something I am missing? Please suggest. Thanks.

asked Mar 23 in Written Exam by Rajat Maheshwari (14 points) | 9 views

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Probability#normal distribution
In a sample of 100 students, the mean of the marks (only integers) obtained by them in a test is 14 with its standard deviation of 2.5(marks obtained can be fitted with a normal distribution ).the percentage of students scoring 16 marks is a)36 b)23 c)12 d)10 (Area under standard normal curve between z=0 and z=0.6 is 0.2257 ; and between z=0 and z=1.0 is 0.3413)

asked Jan 30 in Probability by kalra05 (73 points) | 57 views

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Testbook: Mock
In a BST, the key with value 5 was searched after traversing nodes with values 1,3,4,6,7,8,9, not necessarily in that order. What is the probability that the 3rd element on the search path beginning from the root is either 3 or 8?

asked Jan 29 in DS by Sambhrant Maurya (401 points) | 83 views

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gate 2008 it ques 23 doubt regarding options
In https://gateoverflow.in/3284/gate2008-it-23 are the options given correct?

asked Jan 26 in Probability by Pratyush Priyam Kuan (804 points) | 29 views

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SELF DOUBT: VARIANCE
When $n$ and $p$ is available can we apply $Binomial$ $theorem$ in ALL THE CASES to find the $variance$ by using the formula $npq?$

asked Jan 23 in Probability by Debapaul (699 points) | 16 views

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Conditional Probablity
Conditional probabilities Remark. In your answers to all three questions of this section, give an explanation as to why you believe your answer is correct. Marks will not be awarded for answers with numbers not accompanied by any explanation or ... that a student studies Computer Science, and the probability that the student is male provided that he studies Computer Science

asked Jan 11 in Probability by OBaid Alam (8 points) | 8 views

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Conditional Probabiltiy
A box contains 4 coins. In which two of them are regular coins i.e. one side head and another side tail. And two coins are fake coins, one consists of head on both sides and another coin consists of tail on both sides. Then what is the probability of getting a ... fake? a) 0.25 b) 0.75 c) 0.60 I tried using bayes theorem but I am not able to formulate the values precisely.

asked Dec 26, 2019 in Probability by haralk10 (62 points) | 28 views

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Maths Poisson Distribution
Vehicles arriving at an intersection from one of the approach roads follow the Poisson distribution. The mean rate of arrival is 900 vehicles per hour. If a gap is defined as the time difference between two successive vehicle arrivals (with vehicles ... the probability (up to four decimal places) that the gap is greater than 8 seconds is ___________ Anyone please clarify.

asked Dec 14, 2019 in Probability by Shivateja MST (113 points) | 41 views

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Maths Probability
A Set S has 20 elements.A Subset P of S is selected at random.After inspecting the elements the elements are put back in to S and then a subset Q is selected at random.Then the probability that P and Q are disjoint is _______ (1/3)^20 (1/2)^20 (2/3)^20 (3/4)^20 Anyone please clarify.

asked Dec 13, 2019 in Probability by Shivateja MST (113 points) | 15 views

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Probability Uniform Distribution
Buses arrive at a specified stop at 15-minute intervals starting at 7 A.M.That is, they arrive at 7, 7:15, 7:30, 7:45, and so on.If a passenger arrives at the stop at a time that is uniformly distributed between 7 and 7:30, find the probability that ... than 5 minutes for a bus. (2) More than 10 minutes for a bus. (3) atleast 12 min for a bus. Anyone please clarify.

asked Dec 12, 2019 in Probability by Shivateja MST (113 points) | 7 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, 2019 in Probability by vishal burnwal (135 points) | 33 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, 2019 in Probability by `JEET (179 points) | 27 views

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

asked Sep 15, 2019 in Probability by `JEET (179 points) | 27 views

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Problem on Probability
A set contain 5 distinct element .A one-one mapping is selected at random from A to A.Find the probability that number match to exactly itself.

asked Sep 15, 2019 in Combinatory by Registered user 92 (7 points) | 21 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, 2019 in Probability by `JEET (179 points) | 12 views

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if A and B are mutually exclusive event with P(A)=0.3 P(B)= 0.5 then $P(A \cap B) =$

asked Sep 3, 2019 in Numerical Ability by OgbeborBeatrice (13 points) | 114 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

asked Aug 30, 2019 in Probability by Neil0 (6 points) | 17 views

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

asked Aug 29, 2019 in Probability by ummokkate (48 points) | 17 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?

asked Aug 25, 2019 in Probability by ummokkate (48 points) | 27 views

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

asked Aug 22, 2019 in Probability by Shubhm (23 points) | 32 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, 2019 in Probability by sachin270895 (6 points) | 9 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?

asked Jul 18, 2019 in Probability by koyel123 (21 points) | 21 views

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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?

asked Jul 10, 2019 in Probability by aditi19 (55 points) | 56 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?

asked Jul 9, 2019 in Probability by Ayon Mitra (7 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, 2019 in Probability by pavitra (6 points) | 14 views

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aptitude probabilty rolling dies
whats is the probabolity???????????

asked Jul 1, 2019 in Verbal Ability by shiva0 (19 points) | 30 views

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

asked Jun 30, 2019 in Probability by aditi19 (55 points) | 25 views

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Probability , permutations and combinations
What is the solution for the below problem, can anyone explain clearly,.........

asked Jun 24, 2019 in Numerical Ability by shiva0 (19 points) | 18 views

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