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Recent questions tagged engineering-mathematics

2 votes

2 answers

1231

Question on permutation and combination
Given answer: B, Please explain me how to solve it.

shikharV asked in Combinatory Jan 6, 2016

1.9k views

0 votes

1 answer

1232

Question on graph theory
Please explain how did they get that equation in E and V.

shikharV asked in Graph Theory Jan 4, 2016

637 views

0 votes

0 answers

1233

Sum of all intercepts of inverse of a function?

Tushar Shinde asked in Graph Theory Jan 4, 2016

by Tushar Shinde

334 views

0 votes

1 answer

1234

Linear Algebra Doubt
while solving linear equations, there comes a case where rank < number of varibles, then we say there are n-r linearly independent solution. What exactly does it mean ?

Sandeep Singh asked in Linear Algebra Jan 4, 2016

by Sandeep Singh

528 views

3 votes

2 answers

1235

Gate_2007 ME
The number of linearly independent Eigen vectors of is a) 0 b) 1 C) 2 d) infinite

Himanshu1 asked in Linear Algebra Jan 2, 2016

11.0k views

1 vote

3 answers

1236

Chromatic number
What is the chromatic number of Kn - e (complete graph with an edge removed)?

Mojo-Jojo asked in Set Theory & Algebra Jan 2, 2016

1.6k views

3 votes

1 answer

1237

GATE_2014 ME
Consider a 3 x 3 real symmetric matrix S such that two of its eigen values are a ≠ 0 , b ≠ 0 with respective Eigen vectors [ x1 x2 x3 ] , [ y1 y2 y3 ] . If a ≠ b then x1y1 + x2y2 + x3y3 is a) a b) b c) ab d) 0

Himanshu1 asked in Linear Algebra Jan 2, 2016

2.4k views

3 votes

1 answer

1238

Eigen Values of special matrices
A) what are the eigen values of Orthogonal matrix ? Describe general properties. B) what are the Eigen value of skew-symmetric matrix ? Describe general properties. C) Are there any speciality in Eigen values of Symmetric, Hermitian, Skew- Hermitian, Unitary . If there , describe them also.

Himanshu1 asked in Linear Algebra Jan 1, 2016

1.6k views

3 votes

2 answers

1239

Bayes Probability Question
URN I contains 3 White,2 Black 2 Green Balls. URN II contains 2 White,3 Black 4 Green Balls. URN III contains 5 White,2 Black 2 Green Balls. An urn is chosen at random and two balls are drawn,they happen to be black and green. What is the probability that the come from urns 1) URN I 2) URN II 3) URN III ????

bahirNaik asked in Probability Jan 1, 2016

2.1k views

4 votes

3 answers

1240

different independent eigen vectors
In A = (aij)nxn where aij = 1 ∀ i,j then number of different independent Eigen Vectors of A are _________ . (a) 1 (b) n-1 (c) 2 (d) n

Himanshu1 asked in Linear Algebra Dec 31, 2015

1.6k views

0 votes

1 answer

1241

LA:Minimal polynomials and characteristic polynomials
What is the Difference Between Minimal polynomials and characteristic polynomials ? With some example ?

Prasanna asked in Linear Algebra Dec 31, 2015

612 views

1 vote

2 answers

1242

Probability question on a pair of dice
I think the ans should be C, but the given answer is A. Anyone can explain please?

khantesh1 asked in Combinatory Dec 31, 2015

831 views

3 votes

2 answers

1243

Counting number of functions which are neither 1-1 nor onto
Let $A = \left \{1, 2, 3, 4 \right \}$. Number of functions possible on $A$ which are neither $1-1$ nor on-to is _________.

shikharV asked in Combinatory Dec 31, 2015

602 views

0 votes

1 answer

1244

Question on combinatorics
Given solution of this question: I think that number of 5 elements subsets with 7 should be C(n-1, 4) instead of C(n,4) as we have already fixed 7 so number of elements left will be n-1. Please check

shikharV asked in Combinatory Dec 31, 2015

1.3k views

1 vote

2 answers

1245

Question on rolling fair dice
Given answer: A Please explain

shikharV asked in Combinatory Dec 30, 2015

544 views

1 vote

1 answer

1246

Question on counting number of ways scholarship can be distributed
Given explanation of the question: I believe that in place of last C(8,3) it should be C(7,3) because 3 people have been already chosen before that. Please check whether I am correct or not.

shikharV asked in Combinatory Dec 30, 2015

406 views

4 votes

1 answer

1247

First Order Logic Question: English to predicate
2. Let S(x) be the predicate "x is a student," B(x) the predicate "x is a book, " and H(x,y) the predicate "x has y, " where the universe of discourse is the universe, that is the set of all objects. ... will someone explain briefly ? I tried my best to dechiper in to predicate, But failed.

Prasanna asked in Mathematical Logic Dec 30, 2015

2.3k views

1 vote

2 answers

1248

Probablity: A bag Contains

Prasanna asked in Probability Dec 28, 2015

406 views

2 votes

1 answer

1249

Combinatory
The number of ways 16 identical objects can be distributed among 4 persons such that each person gets atleast 2 objects is ______. If possible kindly explain me the approach.

UK asked in Combinatory Dec 27, 2015

by UK

518 views

2 votes

2 answers

1250

probability
Three numbers are chosen at random without replacement from $\left\{1, 2, 3,....., 10 \right\}$. What is the probability that minimum of the chosen numbers is $3$ or their maximum is $7$? $\frac{11}{30}$ $\frac{11}{40}$ $\frac{1}{7}$ $\frac{1}{8}$

Himanshu1 asked in Probability Dec 26, 2015

2.1k views

3 votes

1 answer

1251

Eigen values
The possible set of eigen values of a $4*4$ skew symmetric; orthogonal real matrix is A). $\pm i$ B), $(\pm i,\pm1)$ C). $\pm1$ D). $(0,\pm i)$

Himanshu1 asked in Linear Algebra Dec 26, 2015

2.0k views

1 vote

1 answer

1252

Subject Topic- Probability
what is positively skewed ,symmetric and negatively skewed distribution?

Amey asked in Probability Dec 25, 2015

by Amey

965 views

3 votes

1 answer

1253

linear equation
consider following set of equations $x_1+x_2+x_3=6$ $2x_1+2x_2+3x_3=14$ $3x_1+x_2+2x_3=14$ Solution for this set exists when value of $x_2$ is

Pooja Palod asked in Linear Algebra Dec 16, 2015

660 views

4 votes

3 answers

1254

eigen value
Eigenvalue of matrix $A$ , $\begin{bmatrix} 2 &7 &10 \\ 5& 2 & 25\\ 1& 6 &5 \end{bmatrix}$ is $-9.33$ other eigenvalue is 1) $18.33$ 2) $-18.33$ 3) $18.33-9.33 i$ 4) $18.33+9.33i$

Pooja Palod asked in Linear Algebra Dec 16, 2015

1.0k views

0 votes

1 answer

1255

maxima-minima query
consider the following function f(x) = x3 /3+ x2 /2 -6x+1000 find the intervals on which f is increasing. Is my solution right approach for this kind of numerical?? Caption

khushtak asked in Calculus Dec 15, 2015

974 views

1 vote

0 answers

1256

Find the Coefficient
Find the coefficient of $x^4$ in the series expansion of $(1+x+x^2)^{-4}$? How do you expand $(1+x+x^2)^{-4}$? Using Taylor series?

amarVashishth asked in Mathematical Logic Dec 3, 2015

by amarVashishth

449 views

4 votes

1 answer

1257

max no of saddle point.. explain
A $n \times n$ matrix is given and an element $a_{ij}$ is called saddle point if all the element in the $i^{th}$ row are less than $a_{ij}$ and all the element in $j^{th}$ column are greater than $a_{ij}$. How many maximum no of saddle point are possible. $2$ $3$ $n$ $1$

yes asked in Calculus Nov 30, 2015

by yes

448 views

7 votes

3 answers

1258

combinatory
How many ways are there for a horse race with 4 horses to finish if ties are possible?(any number of horses may tie)

Pooja Palod asked in Combinatory Nov 27, 2015

989 views

2 votes

2 answers

1259

Suppose the element a,b in a group satisfies aba-1=b2 for b<>e

worst_engineer asked in Set Theory & Algebra Nov 25, 2015

by worst_engineer

5.0k views

30 votes

4 answers

1260

What is/was your strategy for GATE Preparation?
Frequently it has been found that people ask each other or at least try to read about/ hear from others about how are they preparing for GATE. This question is a place where you should share answers to : What is your formula for ... , What is the critical point of advice. you prefer to give Any other relevant info. that you can come up with

amarVashishth asked in Study Resources Nov 23, 2015

by amarVashishth

7.1k views

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Recent questions tagged engineering-mathematics