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12th Standard Business Maths English Medium Free Online Test One Mark Questions with Answer Key 2020

12th Standard

    Reg.No. :
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Business Maths

Time : 00:10:00 Hrs
Total Marks : 10

    Answer all the questions

    10 x 1 = 10
  1. The rank of the unit matrix of order n is

    (a)

    n −1

    (b)

    n

    (c)

    n +1

    (d)

    n2

  2. \(\frac { { 2x }^{ 3 } }{ 4+{ x }^{ 4 } } \)dx is

    (a)

    \(log\left| 4+{ x }^{ 4 } \right| +c\)

    (b)

    \(\frac { 1 }{ 2 } log\left| 4+{ x }^{ 4 } \right| +c\)

    (c)

    \(\frac { 1 }{4 } log\left| 4+{ x }^{ 4 } \right| +c\)

    (d)

    \(log\left| \frac { { 2x }^{ 3 } }{ { 4+x }^{ 4 } } \right| +c\)

  3. ∫ (1-x) \(\sqrt { x } \) dx = ______________+c 

    (a)

    \(\frac { 2 }{ 3 } { x }^{ \frac { 3 }{ 2 } }-\frac { 5 }{ 2 } \)

    (b)

    \({ x }^{ \frac { 3 }{ 2 } }-\frac { 2 }{ 5 } { x }^{ \frac { 5 }{ 2 } }\)

    (c)

    \(\frac { 3 }{ 2 } { x }^{ \frac { 2 }{ 3 } }-\frac { 5 }{ 2 } { x }^{ \frac { 2 }{ 5 } }\)

    (d)

    \(\frac { 2 }{ 3 } { x }^{ \frac { 3 }{ 2 } }-\frac { 2 }{ 5 } { x }^{ \frac { 5 }{ 2 } }\)

  4. The demand and supply functions are given by D(x)= 16 − x2 and S(x) = 2x2 + 4 are under perfect competition, then the equilibrium price x is

    (a)

    2

    (b)

    3

    (c)

    4

    (d)

    5

  5. The area of the region bounded by y = x + 1, the X-axis and the lines x = 0, x = 1 is___________.

    (a)

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

    (b)

    2

    (c)

    \(\frac{3}{2}\)

    (d)

    1

  6. If X is a discrete random variable and p(x) is the probability of X, then the expected value of this random variable is equal to

    (a)

    \(\sum { f(x) } \)

    (b)

    \(\sum[x+f(x)]\)

    (c)

    \(\sum { f(x)+x } \)

    (d)

    \(\sum { xp(x) } \)

  7. The parameters of the normal distribution \(f(x)=\left(\frac{1}{\sqrt{72 \pi}}\right)\)\(\frac{e^{-(x-10)^{2}}}{72}\) –∞ <  x  <  

    (a)

    (10,6)

    (b)

    (10,36)

    (c)

    (6,10)

    (d)

    (36,10)

  8. In simple random sampling from a population of N units, the probability of drawing any unit at the first draw is

    (a)

    \(\frac{n}{N}\)

    (b)

    \(\frac{1}{N}\)

    (c)

    \(\frac{N}{n}\)

    (d)

    1

  9. Another name of consumer’s price index number is:

    (a)

    Whole-sale price index number

    (b)

    Cost of living index

    (c)

    Sensitive

    (d)

    Composite

  10. North-West Corner refers to ________

    (a)

    top left corner

    (b)

    top right corner

    (c)

    bottom right corner

    (d)

    bottom left corner

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TN 12th Standard Business Maths free Online practice tests

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