#### 12th Standard Business Maths English Medium Free Online Test Book Back 1 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 m×n matrix whose elements are unity is

(a)

0

(b)

1

(c)

m

(d)

n

2. ഽ2xdx is

(a)

2x log 2 + c

(b)

2x + c

(c)

$\frac { 2^{ x } }{ log2 } +c$

(d)

$\frac { log2 }{ { 2 }^{ x } } +c$

3. Area bounded by the curve y = e−2x between the limits 0 ≤ x ≤ ∞ is

(a)

1 sq.units

(b)

$\frac{1}{2}$ sq.unit

(c)

5 sq.units

(d)

2 sq.units

4. The order and degree of the differential equation $\sqrt { \frac { { d }^{ 2 }y }{ { dx }^{ 2 } } } =\sqrt { \frac { dy }{ dx } +5 }$ are respectively

(a)

2 and 3

(b)

3 and 2

(c)

2 and 1

(d)

2 and 2

5. Δf(x) =

(a)

f(x+ h)

(b)

f(x) − f(x+h)

(c)

f(x + h) − f(x)

(d)

f (x) − f(x−h)

6. Demand of products per day for three days are 21, 19, 22 units and their respective probabilities are 0⋅ 29, 0⋅ 40, 0⋅ 35. Pofit per unit is 0⋅ 50 paisa then expected profits for three days are

(a)

21, 19, 22

(b)

21.5, 19.5, 22.5

(c)

0.29, 0.40, 0.35

(d)

3.045, 3.8, 3.85

7. If X ~N(9,81) the standard normal variate Z will be

(a)

$Z=\frac { X- 81 }{ 9 }$

(b)

$Z=\frac { X-9 }{ 81 }$

(c)

$Z=\frac { X-9 }{ 9 }$

(d)

$Z=\frac { 9-X }{ 9 }$

8. A __________ of statistical individuals in a population is called a sample.

(a)

Infinite set

(b)

finite subset

(c)

finite set

(d)

entire set

9. A time series consists of

(a)

Five components

(b)

Four components

(c)

Three components

(d)

Two components

10. In a non – degenerate solution number of allocations is

(a)

Equal to m+n–1

(b)

Equal to m+n+1

(c)

Not equal to m+n–1

(d)

Not equal to m+n+1