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11th Standard English Medium Business Maths Subject Book Back 1 Mark Questions with Solution Part - II

11th Standard

    Reg.No. :
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Business Maths

Time : 00:30:00 Hrs
Total Marks : 10
    10 x 1 = 10
  1. The inverse matrix of \(\begin{pmatrix} \frac { 1 }{ 5 } & \frac { 5 }{ 25 } \\ \frac { 2 }{ 5 } & \frac { 1 }{ 2 } \end{pmatrix}\) is ________.

    (a)

    \({{7}\over{30}}\begin{pmatrix} \frac { 1 }{ 2 } & \frac { 5 }{ 12 } \\ \frac { 2 }{ 5 } & \frac { 4 }{ 5 } \end{pmatrix}\)

    (b)

    \({{7}\over{30}}\begin{pmatrix} \frac { 1 }{ 2 } & \frac { -5 }{ 12 } \\ \frac { -2 }{ 5 } & \frac { 1 }{ 5 } \end{pmatrix}\)

    (c)

    \({{30}\over{7}}\begin{pmatrix} \frac { 1 }{ 2 } & \frac { 5 }{ 12 } \\ \frac { 2 }{ 5 } & \frac { 4 }{ 5 } \end{pmatrix}\)

    (d)

    \({{30}\over{7}}\begin{pmatrix} \frac { 1 }{ 2 } & \frac { -5 }{ 12 } \\ \frac { -2 }{ 5 } & \frac { 4 }{ 5 } \end{pmatrix}\)

  2. The number of parallelograms that can be formed from a set of four parallel lines intersecting another set of three parallel lines is _________.

    (a)

    18

    (b)

    12

    (c)

    9

    (d)

    6

  3. The equation of the circle with centre (3,-4) and touches the x - axis is _______.

    (a)

    (x - 3)2 +(y - 4)2 = 4

    (b)

    (x - 3)2 +(y + 4)2 = 16

    (c)

    (x-3)+ (y- 4)= 16

    (d)

    x2+y= 16

  4. The value of \(\frac{3 \tan 10^{\circ}-\tan ^3 10^{\circ}}{1-3 \tan ^2 10^{\circ}}\) is _______,

    (a)

    \(\frac{1}{\sqrt3}\)

    (b)

    \(\frac{1}{2}\)

    (c)

    \(\frac{\sqrt3}2\)

    (d)

    \(\frac{1}{\sqrt2}\)

  5. \(\frac{d}{dx}(\frac{1}{x})\) is equal to ________.

    (a)

    \(-\frac{1}{x^2}\)

    (b)

    \(-\frac{1}{x}\)

    (c)

    log x

    (d)

    \(\frac{1}{x^2}\)

  6. Purchasing price of one share of face value 100 available at a discount of \(9\frac{1}{2}\%\) with brokerage \(\frac{1}{2}\%\) is ________.

    (a)

    Rs. 89

    (b)

    Rs. 90

    (c)

    Rs. 91

    (d)

    Rs. 95

  7. The mean of the values 11,12,13,14 and 15 is _________.

    (a)

    15

    (b)

    11

    (c)

    12.5

    (d)

    13

  8. The correlation coefficient is ________.

    (a)

    r(X, Y) = \(\frac { { \sigma }_{ x }{ \sigma }_{ y } }{ cov(x,y) } \)

    (b)

    r(X, Y) = \(\frac { cov(x,y) }{ { \sigma }_{ x }{ \sigma }_{ y } } \)

    (c)

    r(X, Y) = \(\frac { cov(x,y) }{ { \sigma }_{ y } } \)

    (d)

    r(X, Y) = \(\frac { cov(x,y) }{ { \sigma }_{ x } } \)

  9. If r = –1, then correlation between the variables ________.

    (a)

    perfect positive

    (b)

    perfect negative

    (c)

    negative

    (d)

    no correlation

  10. In critical path analysis, the word CPM mean ______.

    (a)

    Critical path method

    (b)

    Crash project management

    (c)

    Critical project management

    (d)

    Critical path management

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