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Recent questions in Engineering Mathematics

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Dearangements in permutations and combinations
How many derangements of {1, 2, 3, 4, 5, 6, 7} begin with the integers 1, 2, & 3 in some order

Aj1202 asked in Mathematical Logic 6 hours ago

by Aj1202

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2

GATE EE 2007
The linear operation L(x) is defined by the cross product L(x) = b x X, where b=[0 1 0] and X=[xxx]' are three dimensional vectors. The 3 x 3 matrix M of this operation satisfies: L(x)=M (x1 x2 x3)' Then the eigen values of M are: (a) 0, +1,-1 (b) 1, -1, 1 (c) i, -i, 0 (d) i, -i, 1 [EE, GATE-2007, 2 marks]

Priyanshu Karmakar asked in Linear Algebra 10 hours ago

by Priyanshu Karmakar

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1 answer

3

What is the probability that a five-card poker hand contains the two of diamonds, the three of spades, the six of hearts, the ten of clubs, and the king of hearts?

nobibx asked in Probability 3 days ago

by nobibx

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4

discrete mathematics
The maximum number of edges possible in a graph G with 9 vertices which is 3 colourable is equal to A 24 B 27 C 36 D None of the above

someshawasthi asked in Graph Theory 3 days ago

by someshawasthi

57 views

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5

kenneth rosen, counting, exercise: 6.5, question: 50
How many ways are there to distribute five distinguishable objects into three indistinguishable boxes?

Roshakaw asked in Combinatory Mar 24

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6

Kenneth Rosen, exercise: 6.2, question: 8
Show that if f is a function from S to T , where S and T are finite sets with |S| > |T |, then there are elements s1 and s2 in S such that f (s1) = f (s2), or in other words, f is not one-to-one. How can I prove it by using “proof by contradiction”? Is it possible to prove the same by using “proof by contraposition”? If yes, how?

Roshakaw asked in Combinatory Mar 23

17 views

4 votes

2 answers

7

GO Classes Weekly Quiz 4 | Propositional Logic | Question: 4
If $\mathbf{p}$ is true, $\mathbf{q}$ is true, and $\mathbf{r}$ is true, find the truth value of the statement. $ (p \wedge q) \leftrightarrow(q \vee \sim r) $ Choose the correct answer below. True because $(p \wedge q)$ ... and $(q \vee \sim r)$ is false. False because $(p \wedge q)$ is true and $(q \vee \sim r)$ is true.

GO Classes asked in Mathematical Logic Mar 22

252 views

2 votes

2 answers

8

GO Classes Weekly Quiz 4 | Propositional Logic | Question: 5
If $p$ is true and $q$ is false then the truth values of $(p \rightarrow q) \leftrightarrow(\sim q \rightarrow \sim p)$ and $(\sim p \vee \sim q) \wedge(\sim q \vee p)$ are respectively True, True True, False False, False False, True

GO Classes asked in Mathematical Logic Mar 22

160 views

2 votes

2 answers

9

GO Classes Weekly Quiz 4 | Propositional Logic | Question: 6
If $(p \wedge \sim q) \wedge(p \wedge r) \rightarrow \sim p \vee q$ is false, then the truth values of $p, q$ and $r$ are, respectively : $F, T, F$ $T, F, T$ $T, T, T$ $F, F, F$

GO Classes asked in Mathematical Logic Mar 22

133 views

2 votes

3 answers

10

GO Classes Weekly Quiz 4 | Propositional Logic | Question: 7
If $p, q, r$ are simple statement with truth values $T, F, T$ respectively then the truth value of $((\sim p \vee q) \wedge r) \rightarrow p$ is : True False True if $r$ is false True if $q$ is true

GO Classes asked in Mathematical Logic Mar 22

172 views

6 votes

4 answers

11

GO Classes Weekly Quiz 4 | Propositional Logic | Question: 8
A very special island, "Smullyan's island", is inhabited only by knights and knaves. Knights always tell the truth, and knaves always lie. You encounter two people, $\text{A}$ and $\text{B. A}$ says " ... , respectively, if they address you in the above way described: Knight, Knight Knight, Knave Knave, Knight Knave, Knave

GO Classes asked in Mathematical Logic Mar 22

244 views

0 votes

1 answer

12

#Eigen Vectors
Find the eigen values and eigen vector of the following matrix????

Çșȇ ʛấẗẻ asked in Mathematical Logic Mar 21

by Çșȇ ʛấẗẻ

54 views

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1 answer

13

self doubt
how to write if and only if symbolic form explain in detail????

Çșȇ ʛấẗẻ asked in Mathematical Logic Mar 20

by Çșȇ ʛấẗẻ

32 views

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2 answers

14

Can any one solve this , 6B and 4G ,at least 2 girls should be together in circular arrangement

Shivank121 asked in Combinatory Mar 19

55 views

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1 answer

15

explain universal quantifiers and existential quantifiers with example what is De morgan's law for quantifiers

gund pragati sunil asked in Mathematical Logic Mar 11

by gund pragati sunil

63 views

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1 answer

16

explain with example, notations used and mathematical expressions to describe the following terms .i)membership ii) subset iii) equality of two sets iv) union

gund pragati sunil asked in Mathematical Logic Mar 11

by gund pragati sunil

48 views

1 vote

1 answer

17

canvas
The weight of a light bulb has an average of 12.5 grs. with a standard deviation of 2. Assume the variable is normally distributed. If an inspector select randomly a sample of 30 bulbs ¿what is the probability of the weight of one bulb falls between 10 and 15 grs.?

Ernestogld asked in Probability Mar 10

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18

Numerical Method Analysis : Help...
Use LU Decomposition method to solve the following system. $\left\{\begin{matrix} & x_{1} +x_{2}-x_{3} =1 \\ & x_{1} +2x_{2}-2x_{3} =0 \\ & -2x_{1} +x_{2}+x_{3} =1 \end{matrix}\right.$ ...

kidussss asked in Linear Algebra Mar 8

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19

Numerical Method Analysis : Help...
Solve the following system using Gauss elimination with partial pivoting. $\left\{\begin{matrix} &2x_{1}+x_{2}+x_{3}=10\\ & 3x_{1}+2x_{2}+3x_{3}=18 \\ & 5x_{1}+4x_{2}+2x_{3}=9 \end{matrix}\right.$ ...

kidussss asked in Linear Algebra Mar 8

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20

Numerical Method Analysis : Help...
Use Secant method to find roots of: $x^3-2x^2+3x-5=0$ $x+1 = 4sinx$ $e^x = x + 2$

kidussss asked in Linear Algebra Mar 8

30 views

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