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Applications of Integrals

Differential equations

(d)

(e)

2 (2)
10 (10)

Probability

Totals

6.

-

-

Linear - Programming

3 - dimensional geometry

1 (1)

1 (1)

1 (1)

1 (1)

5.

(b)

Vectors

Integrals

(c)

4. (a)

Applications of Derivatives

(b)

1 (1)

Continuity and Differentiability

3. (a)

2 (2)
1 (1)

Matrices Determinants

48 (12)

8 (2)

-

-

4 (1)

4 (1)

12 (3)

4 (1)

8 (2)

4 (1)

4 (1)

(4 Marks)

(1 Mark)
__________

SA

VSA

(b)

2. (a)

Functions

Inverse trigonometric

Relations and Functions

1. (a)

(b)

Topic

S.No.

BLUE PRINT - II
MATHEMATICS
CLASS - XII

42 (7)

-

6 (1)

12 (2)

-

6 (1)

6 (1)

-

6 (1)

6 (1)

(6 Marks)

LA

13 (5)

100 (29)

10 (4)

6 (1)

17 (4)

5 (2)

} 19 (5) 44 (13)

} 20 (6)

5 (2)

8 (3)

10 (2)

TOTAL
Sample Question Paper - II
Mathematics - Class XII
Time : 3 Hours

Max. Marks : 100

General Instructions
1.

All questions are compulsory.

2.

The question paper consists of 29 questions divided into three sections A, B and C. Section A comprises of
10 questions of one mark each, section B comprises of 12 questions of four marks each and section C
comprises of 07 questions of six marks each.

3.

All questions in Section A are to be answered in one word, one sentence or as per the exact requirement of the
question.

4.

There is no overall choice. However, internal choice has been provided in 04 questions of four marks each
and 02 questions of six marks each. You have to attempt only one of the alternatives in all such questions.

5.

Use of calculators is not permitted. You may ask for logarithmic tables, if required.
SECTION - A

Q.1.

If A is a square matrix of order 3 such that |adj A| = 64, find |A|.

Q.2.

If A, B, C are three non zero square matrices of same order, find the condition on A such that AB = AC ⇒ B = C

Q.3.

Give an example of two non zero 2 × 2 matrices A, B such that AB = 0.

Q.4.

If f (1) = 4; f ′ (1) = 2, find the value of the derivative of log f(ex) w.r.t x at the point x = 0.

Q.5.

Find a, for which f(x) = a(x + sin x) + a is increasing.

Q.6.

Evaluate,

Q.7.

dy
dy
Write the order and degree of the differential equation, y = x + a 1 +
dx
dx

(where [x] is greatest integer function)

(32)

2
→

Q.8.

→

→

→

→

→

ˆ ˆ
ˆ j
j ˆ
If a = i + ˆ ; b = ˆ + k ; c = k + i , find a unit vector in the direction of a + b + c

Q.9.

A four digit number is formed using the digits 1, 2, 3, 5 with no repetitions. Find the probability that the number
is divisible by 5.

Q.10.

The probability that an event happens in one trial of an experiment is 0.4. Three independent trials of the
experiment are performed. Find the probability that the event happens at least once.
SECTION - B

Q.11.

Q.12.

5 2 
 + 2 tan −1 1
 7 
8



1
5

−1
−1
Find the value of 2 tan   + sec 

0 1 
If A = 
, prove that (aI + bA )n = a n .I + na n −1bA where I is a unit matrix of order 2 and n is a
0 0


positive integer
OR
Using properties of determinants, prove that

a + b + 2c
a
c
b + c + 2a
c

a

b
b

= 2 (a + b + c )3

c + a + 2b

d2 y

Q.13.

If x = a sin pt and y = b cos pt, find the value of

Q.14.

Find the equations of tangent lines to the curve y = 4 x 3 − 3x + 5 which are perpendicular to the line

dx 2

at t = 0.

9y + x + 3 = 0 .
Q.15.

Show that the function f (x ) = x + 2 is continuous at every x ∈ R but fails to be differentiable at x = –2.

Q.16.

Evaluate

Q.17.

∫x

x2 + 4

dx

Evaluate

4

+ x 2 + 16

(33)
OR
Evaluate

Q.18.

→ → →

If a , b , c are the position vectors of the vertices A, B, C of a ∆ ABC respectivily. Find an expression for the
area of ∆ ABC and hence deduce the condition for the points A, B, C to be collinear.
OR

ˆ j ˆ ˆ j ˆ
ˆ
Show that the points A, B, C with position vectors 2i − ˆ + k , i − 3ˆ − 5k and 3i − 4ˆ − 4k respectively, are
j ˆ
the vertices of a right triangle. Also find the remaining angles of the triangle.
Q.19.

Evaluate,

Q.20.

Solve the differential equation,

dy
+ y sec 2 x = tan x sec 2 x ; y (0) = 1
dx
OR

2 xy + y 2 − 2 x 2
Q.21.

dy
= 0 ; y (1) = 2
dx

In a bolt factory machines, A, B and C manufacture respectively 25%, 35% and 40% of the total bolts. Of their
output 5, 4 and 2 percent are respectively defective bolts. A bolt is drawn at random from the product.
(i) What is the probability that the bolt drawn is defective ?
(ii) If the bolt is found to be defective find the probability that it is a product of machine B.

Q.22.

Two dice are thrown simultaneously. Let X denote the number of sixes, find the probability distribution of X.
Also find the mean and variance of X, using the probability distribution table.
SECTION - C

Q.23.

Let X be a non-empty set. P(x) be its power set. Let ‘*’ be an operation defined on elements of P(x) by,

A*B = A ∩ B v
Then,
(i) Prove that * is a binary operation in P(X).
(ii) Is * commutative ?
(iii) Is * associative ?
(iv) Find the identity element in P(X) w.r.t. *
(v) Find all the invertible elements of P(X)
(vi) If o is another binary operation defined on P(X) as A o B = ,
(34)

then verify that o distributes itself over *.
OR
Consider f : R+ → [–5, ∞) given by f(x) = 9x2 + 6x – 5. Show that f is invertible. Find the inverse of f.
Q.24.

A window has the shape of a rectangle surmounted by an equilateral triangle. If the perimeter of the
window is 12m, find the dimensions of the rectangle that will produce the largest area of the window.

Q.25.

Make a rough sketch of the region given below and find it’s area using integration

Q.26.

Every gram of wheat provides 0.1 gm of proteins and 0.25 gm of carbohydrates. The corresponding values for
rice are 0.05 gm and 0.5 gm respectively. Wheat costs Rs. 4 per kg and rice Rs. 6 per kg. The minimum daily
requirements of proteins and carbohydrates for an average child are 50 gms and 200 gms respectively. In what
quantities should wheat and rice be mixed in the daily diet to provide minimum daily requirements of proteins
and carbohydrates at minimum cost. Frame an L.P.P. and solve it graphically.

1 − 1 1 


Q.27. font A = 2 1 − 3 , find A–1 and hence solve the system of equations
1 1
1



x + 2y + z = 4

−x + y + z = 0

{(x, y); y

x − 3y + z = 2

2

}

≤ 4x, 4x 2 + 4 y 2 ≤ 9

Q.28. Find the equation of the plane containing the lines,
→

(

ˆ
r = i + j + λ i + 2ˆ − k
j ˆ

)

(

→

and

ˆ j
ˆ j ˆ
r = i + ˆ + µ − i + ˆ − 2k

)

Find the distance of this plane from origin and also from the point (1, 1, 1)
OR
Find the equation of the plane passing through the intersection of the planes,

2 x + 3 y − z + 1 = 0 ; x + y − 2z + 3 = 0 and perpendicular the plane 3x − y − 2z − 4 = 0 . Also find
the inclination of this plane with the xy plane.
Q.29. Prove that the image of the point (3, –2, 1) in the plane 3x − y + 4z = 2 lies on the plane, x + y + z + 4 = 0 .

(35)

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Math cbse samplepaper

  • 1. (31) Applications of Integrals Differential equations (d) (e) 2 (2) 10 (10) Probability Totals 6. - - Linear - Programming 3 - dimensional geometry 1 (1) 1 (1) 1 (1) 1 (1) 5. (b) Vectors Integrals (c) 4. (a) Applications of Derivatives (b) 1 (1) Continuity and Differentiability 3. (a) 2 (2) 1 (1) Matrices Determinants 48 (12) 8 (2) - - 4 (1) 4 (1) 12 (3) 4 (1) 8 (2) 4 (1) 4 (1) (4 Marks) (1 Mark) __________ SA VSA (b) 2. (a) Functions Inverse trigonometric Relations and Functions 1. (a) (b) Topic S.No. BLUE PRINT - II MATHEMATICS CLASS - XII 42 (7) - 6 (1) 12 (2) - 6 (1) 6 (1) - 6 (1) 6 (1) (6 Marks) LA 13 (5) 100 (29) 10 (4) 6 (1) 17 (4) 5 (2) } 19 (5) 44 (13) } 20 (6) 5 (2) 8 (3) 10 (2) TOTAL
  • 2. Sample Question Paper - II Mathematics - Class XII Time : 3 Hours Max. Marks : 100 General Instructions 1. All questions are compulsory. 2. The question paper consists of 29 questions divided into three sections A, B and C. Section A comprises of 10 questions of one mark each, section B comprises of 12 questions of four marks each and section C comprises of 07 questions of six marks each. 3. All questions in Section A are to be answered in one word, one sentence or as per the exact requirement of the question. 4. There is no overall choice. However, internal choice has been provided in 04 questions of four marks each and 02 questions of six marks each. You have to attempt only one of the alternatives in all such questions. 5. Use of calculators is not permitted. You may ask for logarithmic tables, if required. SECTION - A Q.1. If A is a square matrix of order 3 such that |adj A| = 64, find |A|. Q.2. If A, B, C are three non zero square matrices of same order, find the condition on A such that AB = AC ⇒ B = C Q.3. Give an example of two non zero 2 × 2 matrices A, B such that AB = 0. Q.4. If f (1) = 4; f ′ (1) = 2, find the value of the derivative of log f(ex) w.r.t x at the point x = 0. Q.5. Find a, for which f(x) = a(x + sin x) + a is increasing. Q.6. Evaluate, Q.7. dy dy Write the order and degree of the differential equation, y = x + a 1 + dx dx (where [x] is greatest integer function) (32) 2
  • 3. → Q.8. → → → → → ˆ ˆ ˆ j j ˆ If a = i + ˆ ; b = ˆ + k ; c = k + i , find a unit vector in the direction of a + b + c Q.9. A four digit number is formed using the digits 1, 2, 3, 5 with no repetitions. Find the probability that the number is divisible by 5. Q.10. The probability that an event happens in one trial of an experiment is 0.4. Three independent trials of the experiment are performed. Find the probability that the event happens at least once. SECTION - B Q.11. Q.12. 5 2   + 2 tan −1 1  7  8   1 5 −1 −1 Find the value of 2 tan   + sec  0 1  If A =  , prove that (aI + bA )n = a n .I + na n −1bA where I is a unit matrix of order 2 and n is a 0 0   positive integer OR Using properties of determinants, prove that a + b + 2c a c b + c + 2a c a b b = 2 (a + b + c )3 c + a + 2b d2 y Q.13. If x = a sin pt and y = b cos pt, find the value of Q.14. Find the equations of tangent lines to the curve y = 4 x 3 − 3x + 5 which are perpendicular to the line dx 2 at t = 0. 9y + x + 3 = 0 . Q.15. Show that the function f (x ) = x + 2 is continuous at every x ∈ R but fails to be differentiable at x = –2. Q.16. Evaluate Q.17. ∫x x2 + 4 dx Evaluate 4 + x 2 + 16 (33)
  • 4. OR Evaluate Q.18. → → → If a , b , c are the position vectors of the vertices A, B, C of a ∆ ABC respectivily. Find an expression for the area of ∆ ABC and hence deduce the condition for the points A, B, C to be collinear. OR ˆ j ˆ ˆ j ˆ ˆ Show that the points A, B, C with position vectors 2i − ˆ + k , i − 3ˆ − 5k and 3i − 4ˆ − 4k respectively, are j ˆ the vertices of a right triangle. Also find the remaining angles of the triangle. Q.19. Evaluate, Q.20. Solve the differential equation, dy + y sec 2 x = tan x sec 2 x ; y (0) = 1 dx OR 2 xy + y 2 − 2 x 2 Q.21. dy = 0 ; y (1) = 2 dx In a bolt factory machines, A, B and C manufacture respectively 25%, 35% and 40% of the total bolts. Of their output 5, 4 and 2 percent are respectively defective bolts. A bolt is drawn at random from the product. (i) What is the probability that the bolt drawn is defective ? (ii) If the bolt is found to be defective find the probability that it is a product of machine B. Q.22. Two dice are thrown simultaneously. Let X denote the number of sixes, find the probability distribution of X. Also find the mean and variance of X, using the probability distribution table. SECTION - C Q.23. Let X be a non-empty set. P(x) be its power set. Let ‘*’ be an operation defined on elements of P(x) by, A*B = A ∩ B v Then, (i) Prove that * is a binary operation in P(X). (ii) Is * commutative ? (iii) Is * associative ? (iv) Find the identity element in P(X) w.r.t. * (v) Find all the invertible elements of P(X) (vi) If o is another binary operation defined on P(X) as A o B = , (34) then verify that o distributes itself over *.
  • 5. OR Consider f : R+ → [–5, ∞) given by f(x) = 9x2 + 6x – 5. Show that f is invertible. Find the inverse of f. Q.24. A window has the shape of a rectangle surmounted by an equilateral triangle. If the perimeter of the window is 12m, find the dimensions of the rectangle that will produce the largest area of the window. Q.25. Make a rough sketch of the region given below and find it’s area using integration Q.26. Every gram of wheat provides 0.1 gm of proteins and 0.25 gm of carbohydrates. The corresponding values for rice are 0.05 gm and 0.5 gm respectively. Wheat costs Rs. 4 per kg and rice Rs. 6 per kg. The minimum daily requirements of proteins and carbohydrates for an average child are 50 gms and 200 gms respectively. In what quantities should wheat and rice be mixed in the daily diet to provide minimum daily requirements of proteins and carbohydrates at minimum cost. Frame an L.P.P. and solve it graphically. 1 − 1 1    Q.27. font A = 2 1 − 3 , find A–1 and hence solve the system of equations 1 1 1   x + 2y + z = 4 −x + y + z = 0 {(x, y); y x − 3y + z = 2 2 } ≤ 4x, 4x 2 + 4 y 2 ≤ 9 Q.28. Find the equation of the plane containing the lines, → ( ˆ r = i + j + λ i + 2ˆ − k j ˆ ) ( → and ˆ j ˆ j ˆ r = i + ˆ + µ − i + ˆ − 2k ) Find the distance of this plane from origin and also from the point (1, 1, 1) OR Find the equation of the plane passing through the intersection of the planes, 2 x + 3 y − z + 1 = 0 ; x + y − 2z + 3 = 0 and perpendicular the plane 3x − y − 2z − 4 = 0 . Also find the inclination of this plane with the xy plane. Q.29. Prove that the image of the point (3, –2, 1) in the plane 3x − y + 4z = 2 lies on the plane, x + y + z + 4 = 0 . (35)