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

12th Standard

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

10 x 1 = 10
1. The rank of an n x n matrix each of whose elements is 2 is __________

(a)

1

(b)

2

(c)

n

(d)

n2

2. If $\int { \frac { { 2 }^{ \frac { 1 }{ x } } }{ { x }^{ 2 } } } dx=k{ 2 }^{ \frac { 1 }{ x } }$ +c, then k is ___________

(a)

$-\frac { 1 }{ { log }_{ e }2 }$

(b)

- loge2

(c)

-1

(d)

$\frac { 1 }{ 2 }$

3. The area of the region bounded by the ellipse __________

(a)

$\pi$ab sq.units

(b)

$\frac{\pi a}{b}$ sq.units

(c)

2$\pi$ab sq.unit

(d)

$\frac{\pi}{2}$ ab sq.units

4. The differential equation of all circles with centre at the origin is _____________

(a)

xdy +ydx = 0

(b)

xdy - ydx = 0

(c)

xdx + ydy = 0

(d)

xdx - ydy = 0

5. ∇f(x+ 3h) ______________

(a)

f{x + 2h)

(b)

f(x + 3h) - f(x + 2h)

(c)

f(x + 3h)

(d)

f(x + 2h) - f(x - 3h)

6. A random variable X has the following probability distribution

 X 0 1 2 3 4 5 P(X=x) $\frac{1}{4}$ 2a 3a 4a 5a $\frac{1}{4}$

Then P(1≤X≤4) is

(a)

$\frac{10}{21}$

(b)

$\frac{2}{7}$

(c)

$\frac{1}{14}$

(d)

$\frac{1}{2}$

7. The standard normal distribution is represented by ___________

(a)

N(0,0)

(b)

N(1,0)

(c)

N(0,1)

(d)

N(1,1)

8. Probability of rejecting null hypothesis. when it is true is _______

(a)

Type I error

(b)

Type II error

(c)

Sampling error

(d)

Standard error

9. The causes leading to vast variation in the specification of a product are usually due to _____

(a)

random process

(b)

assignable causes

(c)

non-traceable causes

(d)

all the above

10. The total transportation cost is ___________

(a)

55

(b)

102

(c)

101

(d)

50