# Class 12 Mathematics Sample Paper Term 2 With Solutions Set C

Please refer to Class 12 Mathematics Sample Paper Term 2 With Solutions Set C below. These Class 12 Mathematics Sample Papers will help you to get more understanding of the type of questions expected in the upcoming exams. All sample guess papers for Mathematics Class 12 have been designed as per the latest examination pattern issued by CBSE. Please practice all Term 2 CBSE Sample Papers for Mathematics in Standard 12.

## Sample Paper Term 2 Class 12 Mathematics With Solutions Set C

Section – A

2. Write the sum of the order and the degree of the following differential equation:

Degree = 1
Sum = 3

3. If a̅ and b̅ are unit vectors, then prove that |a̅ + b̅| = 2 cos (θ/2) where θ is the angle between them.

4. Find the direction cosines of the following line:

Its direction ratios are <1, 1, 4>
Its direction cosines are

5. A bag contains 1 red and 3 white balls. Find the probability distribution of the number of red balls if 2 balls are drawn at random from the bag one-by-one without replacement.
Answer. Let X be the random variable defined as the number of red balls.
Then

Probability distribution Table:

6. Two cards are drawn at random from a pack of 52 cards one-by-one without replacement. What is the probability of getting first card red and second card Jack?
Answer. The required probability = P((The first is a red jack card and The second is a jack card) or (The first is a red non-jack card and The second is a jack card))

Section – B

⇒ x + 1 = (Ax + B)x + C(x2 + 1)(An identity)
Equating the coefficients, we get
B = 1, C = 1, A + C = 0
Hence, A = –1, B = 1, C = 1
The given integral

8. Find the general solution of the following differential equation:

OR
Find the particular solution of the following differential equation, given that y = 0 when x = p/4:

Answer. We have the differential equation

The equation is a homogeneous differential equation.
Putting                             y = vx

Integrating both sides, we get
log | cosec v – cot v| = – log |x|+ log K,
K > 0 (Here, log K is an arbitrary constant.)
⇒ log|(cosec v cot v)x | log K
⇒ |(cosec cot v)x | = K
⇒ (cosec v cot v) x = + K

The differential equation is a linear differential equation

10. Find the shortest distance between the following lines:

OR
Find the vector and the cartesian equations of the plane containing the point î + 2ĵ – k̂ and parallel to the lines r̅ = r̅ = (î + 2ĵ, k̂) + s(2î – 3ĵ – 2k̂) = 0 and r̅ (3î + ĵ – 2k̂) + t(2î – 3ĵ – 2k̂) = 0

Answer. Here, the lines are parallel. The shortest distance

Since, the plane is parallel to the given lines,
the cross product of the vector 2î – 3ĵ + 2k̂
and î – 3ĵ + k̂ will be a normal to the planes:

Section – C

11. Evaluate :

12. Using integration, find the area of the region in the first quadrant enclosed by the line x + y = 2, the parabola y2 = x and x-axis.
OR
Using integration, find the area of the region
{(x, y) : 0 ≤ y ≤ √3x, x2 + y2 ≤ 4}
Answer. Solving x + y = 2 and y2 = x simultaneously,
we get the points of intersection as (1, 1) and (4, –2).

13. Find the foot of the perpendicular from the point (1, 2, 0) upon the plane x – 3y + 2z = 9. Hence, find the distance of the point (1, 2, 0) from the given plane.
Answer. The equation of the line perpendicular to the plane and passing through the point (1, 2, 0) is

The coordinates of the foot of the perpendicular are (μ + 1, –3μ + 2, 2μ) for some μ
These coordinates will satisfy the equation of the plane. Hence, we have

Case-Based/Data Based

14. An insurance company believes that people can be divided into two classes:
those who are accident prone and those who are not. The company’s statistics show that an accident-prone person will have an accident at sometime within a fixed one-year period with probability 0.6, whereas this probability is 0.2 for a person who is not accident prone. The company knows that 20 percent of the people is accident prone.

Based on the given information, answer the following questions.

(i) What is the probability that a new policyholder will have an accident within a year of purchasing a policy?
(ii) Suppose that a new policyholder has an accident within a year of purchasing a policy. What is the probability that he or she is accident prone?
Answer. Let E1 =The policy holder is accident prone.
E2 = The policy holder is not accident prone.
E = The new policy holder has an accident within a year of purchasing a policy.