Questions 21–30 of 87. Imported answers require independent review unless marked reviewed.

Topic practice 87 questionsPage 3 of 9

Question 13

Open question
MTMCQ1 markNeeds review
Consider the normal (Gaussian) distributions

,

,

shown in the figure.

and

are the standard deviation and mean of distribution

, respectively, and the means are positive. Which one of the following deductions is correct?
Diagram for Metallurgical Engineering question 13

Your answerChoose one option.

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Question 28

Open question
MTMSQ1 markNeeds review
Which of the following statements is/are correct for a square matrix

with real number entries?

denotes the transpose of

and

denotes the inverse of

.
Your answerSelect all correct options. You can choose more than one.

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Question 31

Open question
MTNAT1 markNeeds review
The divergence of the vector field

at the point

is ________. (Round off to the nearest integer)

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Question 36

Open question
MTMCQ2 marksNeeds review
If

, where

are not identically zero, then the values of

are
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Question 37

Open question
MTMCQ2 marksNeeds review
If

,

, then
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Question 51

Open question
MTNAT2 marksNeeds review
The following data is obtained from an experiment:
| x | 1 | 2 | 3 | | y | 8 | 15 | 19 |
If the data is fit using the straight line

(where m and c are constants) using the least-squares method, then the value of m is ________. (Round off to one decimal place).

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Question 52

Open question
MTNAT2 marksNeeds review
The integral

evaluates to ________. (Round off to two decimal places)

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Question 13

Open question
MTMCQ1 markNeeds review
Order (O) and degree (D) of the differential equation

are
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Question 23

Open question
MTMCQ1 markNeeds review
The value of

is
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Question 30

Open question
MTNAT1 markNeeds review
The sum of eigen values of the matrix

is __________ (in integer).

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