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Published on: 10/06/2021
QB365 provides detailed and simple solution for every Book back Questions in class 11 Business Maths Subject. It will helps to get more idea about question pattern in every book back questions with solution.
Download Tamil Nadu 11th Standard Business Maths and Statistics question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Business Maths and Statistics Test
1.
The mean of the values 11,12,13,14 and 15 is _________.
15
11
12.5
13
2.
If r = –1, then correlation between the variables ________.
perfect positive
perfect negative
negative
no correlation
3.
Purchasing price of one share of face value 100 available at a discount of \(9\frac{1}{2}\%\) with brokerage \(\frac{1}{2}\%\) is ________.
Rs. 89
Rs. 90
Rs. 91
Rs. 95
4.
The correlation coefficient is ________.
r(X, Y) = \(\frac { { \sigma }_{ x }{ \sigma }_{ y } }{ cov(x,y) } \)
r(X, Y) = \(\frac { cov(x,y) }{ { \sigma }_{ x }{ \sigma }_{ y } } \)
r(X, Y) = \(\frac { cov(x,y) }{ { \sigma }_{ y } } \)
r(X, Y) = \(\frac { cov(x,y) }{ { \sigma }_{ x } } \)
5.
In critical path analysis, the word CPM mean ______.
Critical path method
Crash project management
Critical project management
Critical path management
6.
\(\frac{d}{dx}(\frac{1}{x})\) is equal to ________.
\(-\frac{1}{x^2}\)
\(-\frac{1}{x}\)
log x
\(\frac{1}{x^2}\)
7.
The value of \(\frac{3 \tan 10^{\circ}-\tan ^3 10^{\circ}}{1-3 \tan ^2 10^{\circ}}\) is _______,
\(\frac{1}{\sqrt3}\)
\(\frac{1}{2}\)
\(\frac{\sqrt3}2\)
\(\frac{1}{\sqrt2}\)
8.
The equation of the circle with centre (3,-4) and touches the x - axis is _______.
(x - 3)2 +(y - 4)2 = 4
(x - 3)2 +(y + 4)2 = 16
(x-3)2 + (y- 4)2 = 16
x2+y2 = 16
9.
The number of parallelograms that can be formed from a set of four parallel lines intersecting another set of three parallel lines is _________.
18
12
9
6
10.
The inverse matrix of \(\begin{pmatrix} \frac { 1 }{ 5 } & \frac { 5 }{ 25 } \\ \frac { 2 }{ 5 } & \frac { 1 }{ 2 } \end{pmatrix}\) is ________.
\({{7}\over{30}}\begin{pmatrix} \frac { 1 }{ 2 } & \frac { 5 }{ 12 } \\ \frac { 2 }{ 5 } & \frac { 4 }{ 5 } \end{pmatrix}\)
\({{7}\over{30}}\begin{pmatrix} \frac { 1 }{ 2 } & \frac { -5 }{ 12 } \\ \frac { -2 }{ 5 } & \frac { 1 }{ 5 } \end{pmatrix}\)
\({{30}\over{7}}\begin{pmatrix} \frac { 1 }{ 2 } & \frac { 5 }{ 12 } \\ \frac { 2 }{ 5 } & \frac { 4 }{ 5 } \end{pmatrix}\)
\({{30}\over{7}}\begin{pmatrix} \frac { 1 }{ 2 } & \frac { -5 }{ 12 } \\ \frac { -2 }{ 5 } & \frac { 4 }{ 5 } \end{pmatrix}\)
1.
\(\bar{x}=\frac{11+12+13+14+15}{5}=\frac{65}{5}=13\)
2.
(b)
perfect negative
3.
\(\text { M.V }=100-9 \frac{1}{2}+\frac{1}{2}=Rs.91\)
4.
(b)
r(X, Y) = \(\frac { cov(x,y) }{ { \sigma }_{ x }{ \sigma }_{ y } } \)
5.
(a)
Critical path method
6.
(a)
\(-\frac{1}{x^2}\)
7.
\(\frac{3 \tan 10^{\circ}-\tan ^3 10^{\circ}}{1-3 \tan ^2 10^{\circ}} =\tan 3(10) =\tan 30^{\circ}=\frac{1}{\sqrt{3}} \)
8.
(b)
(x - 3)2 +(y + 4)2 = 16
9.
The number of parallelograms = 4C2 x 3C2
10.
\(A=\left(\begin{array}{cc} \frac{4}{5} & \frac{-5}{12} \\ \frac{-2}{5} & \frac{1}{2} \end{array}\right)\)
\(|A|=\frac{2}{5}-\frac{1}{6}=\frac{12-5}{30}=\frac{7}{30}\)
\(A^{-1}=\frac{1}{|A|} \text { adjA }=\frac{30}{7}\left(\begin{array}{ll} \frac{1}{2} & \frac{5}{12} \\ \frac{2}{5} & \frac{4}{5} \end{array}\right)\)
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Tamilnadu Stateboard 11th Standard Subjects
Maths
Commerce
Economics
Biology
Business Maths and Statistics
Accountancy
Computer Science
Physics
Chemistry
Maths
Biology
Economics
Physics
Chemistry
History
Business Maths and Statistics
Computer Science
Accountancy
Computer Applications
History
Computer Technology
Commerce
Computer Applications
Computer Technology
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