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Sheldon Ross Chapter2 Question15b
If it is assumed that all $\binom{52}{5}$ poker hands are equally likely, what is the probability of being dealt two pairs? (This occurs when the cards have denominations a, a, b, b, c, where a, b, and c are all distinct.) my approach is: selecting a ... I'm getting answer 0.095 but in the book answer is given 0.0475 where am I going wrong?
asked
Jun 14
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Probability
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aditi19
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probability
sheldonross
engineeringmathematics
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Sheldon Ross Example5n
Compute the probability that if 10 married couples are seated at random at a round table, then no wife sits next to her husband 1 wife sits next to her husband. pick one of the 10 couples=$\binom{10}{1}$. These couples can interchange their position such that ... sits together=$\frac{N}{19!}$ so probability that no couple sits together=$1\frac{N}{19!}$ is this correct?
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Jun 11
in
Probability
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aditi19
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171
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permutationandcombination
probability
discretemathematics
sheldonross
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3
Sheldon Ross, Chapter# 4 RANDOM VARIABLES, Q.51 (9th edition page#167)
If a student copies his assignments from his friend he would get 80 marks. If he had done the assignments independently he would have scored 50 marks out of 100 and if the teacher finds he is cheating he ... , what is the probability that he will lose more marks with copying than by doing his independent work independently?
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May 28
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Probability
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Asim Siddiqui 4
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1.3k
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150
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probability
sheldonross
randomvariable
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4
A FIRST COURSE IN PROBABILITY (SHELDON ROSS),CHAPTER 4 RANDOM VARIABLES, QUESTION#43
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May 27
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Probability
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Asim Siddiqui 4
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96
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probability
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randomvariable
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5
Sheldon Ross, Chapter #4, Question #13
An airline operates a flight having 50 seats. As they expect some passenger to not show up, they overbook the flight by selling 51 tickets. The probability that an individual passenger will not show up is 0.01, independent of all other ... the airline has to pay a compensation of Rs.1lakh to that passenger. What is the expected revenue of the airline?
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May 21
in
Probability
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Asim Siddiqui 4
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78
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probability
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sheldonross
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A first course in probability by Sheldon Ross
What are the relevant chapter of probability by sheldon ross to study for gate? I think whole syllabus is within chapter 5,Should i study everything upto chapter 5 or there are some topics that can be skipped.
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May 8
in
Combinatory
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souren
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37
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70
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probability
sheldonross
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7
SHELDON AND ROSS
Twelve percent of all US households are in California. A total of 3.3 percent of all US households earn over 250000 per year, while a total of 6.3 percent California households earn over 250000 per year. If a randomly chosen US household earns over 250,000 per year, ... 10^(3)/(0.033)=0.2291 But the answer given in the instructors manual is .2066 What is wrong with my logic??
asked
Mar 22
in
Probability
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Doraemon
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probability
sheldonross
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8
Expected length Sheldon Ross
This is an example in the book (A First Course in Probability by Sheldon Ross). A stick of length 1 is split at a point U that is uniformly distributed over (0,1). Determine the expected length of the piece that contains the point 0≤p≤1. So, My doubt ... according to proposition g(x) is Lp(U) , what is f(x) why f(x) is not multiplied. in calculating expected value.
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Jan 9
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Probability
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Sandy Sharma
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probability
sheldonross
randomvariable
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9
ProbabilitySheldon Ross(Self Doubt)
I was reading probability from Sheldon Ross and found below example. A purchaser of electrical components buys them in lots of size 10. It is his policy to inspect 3 components from a lot and to accept the lot if all the 3 are nondefective. If 30 percent of ... why they have multiplied it with $\frac{3}{10}$ in the first part and $\frac{7}{10}$ in the second?
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Jul 7, 2018
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Probability
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Ayush Upadhyaya
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ProbabilitySheldon Ross
An ordinary deck of 52 playing cards is randomly divided into 4 piles of 13 cards each. Compute the probability that each pile has exactly 1 ace.
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Jul 6, 2018
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Probability
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Ayush Upadhyaya
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probability
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11
Sheldon ross Conditional probability
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Jun 6, 2018
in
Mathematical Logic
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Prateek Raghuvanshi
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sheldonross
probability
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A First Course in Probability 8th Edition: Axioms of Probability Example 5k
The question in the book is as follows: A football team consist s of 20 offensive and 20 defensive players. The players are to be paired in groups of 2 for the purpose of determining roommates. If the pairing is done at random, ... 2,2,...,2$\times 10!$ My questions is: Why is choosing ordered pairs a mistake in this case?
asked
Apr 29, 2018
in
Probability
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Sagnik Chatterjee
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79
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162
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permutationandcombination
sheldonross
probability
engineeringmathematics
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2
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13
Sheldon Ross A first course in Probability
An urn contains 6 white and 9 black balls. If 4 balls are to be randomly selected without replacement, what is the probability that the first 2 selected are white and the last 2 black. I solved it in this manner : (6C2 * 9C2)/ (15C4)  getting 36 ... (6*5*9*8)/(15*14*13*12)  6/91 I cannot understand exactly why my approach is not working over here.
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Apr 17, 2018
in
Probability
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Subham Nagar
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probability
sheldonross
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14
Sheldon Ross 3.13
Balls are randomly removed from an urn that initially contains 20 red and 10 blue balls. (a) What is the probability that all of the red balls are removed before all of the blue ones have been removed? Now suppose that the urn initially contains 20 red, 10 blue ... red, green? (d) What is the probability that the group of blue balls is the first of the three groups to be removed?
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Apr 10, 2018
in
Probability
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Mk Utkarsh
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probability
sheldonross
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15
Sheldon Ross
From 10 married couples, we want to select group of 6 that is not allowed to contain a married couple. How many choices are there?
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Feb 20, 2018
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Combinatory
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Tesla!
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sheldonross
permutationandcombination
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1
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16
Sheldon Ross
Prove $\binom{m+n}{r}$ = $\binom{n}{0}\binom{m}{r}+\binom{n}{1}\binom{m}{r1}+... +\binom{n}{r}\binom{m}{0}$
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Feb 20, 2018
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Combinatory
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Tesla!
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sheldonross
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17
Sheldon Ross
Determine the number of vectors $\{x_{1}...x_{n}\}$, such that each $x_{i}$ is either $0$ or $1$ and $\displaystyle{\sum_{i=1}^{n}x_{i}\geq k}$
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Feb 19, 2018
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Combinatory
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Tesla!
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sheldonross
permutationandcombination
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18
Sheldon Ross Normal Variable
In the below question my query is for (a) part When we are calculating $P\left \{ \frac{1}{3}< Z< \frac{2}{3} \right \}$ I know that the normal variable X is converted to standard normal variable and then we look for values in normal table but I want to know how the third step came? Please explain anyone.
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Dec 11, 2017
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Probability
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Ayush Upadhyaya
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probability
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randomvariable
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19
Sheldon Ross Example 3.7f
A plane is missing and it is presumed that it was equally likely to have gone down in any of three possible regions. Let 1 − αi denote the probability the plane will be found upon a search of the ith region when the plane is, in fact, in that ... conditional probability that the plane is in the ith region, given that a search of region 1 is unsuccessful, i = 1, 2, 3?
asked
Dec 4, 2017
in
Probability
by
Ahwan
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115
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probability
discretemathematics
sheldonross
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