# CBSE 12th Maths Answer Key 2023 Set 1 2 3 4 Question Paper PDF

This article will discuss the CBSE 12th Maths Answer Key 2023; Maths set 1, 2, 3 & 4 & PDF of question paper & steps to download that PDF.

## CBSE 12th Maths Answer Key 2023

On 11 March 2023, The Central Board of Secondary Education will conduct the 12th-class mathematics exam. The CBSE 12th Maths Answer Key is not yet officially announced. But we will provide you with the answer key once it gets officially released. Students can rely on us; we will update the following article with the official CBSE 12th Maths Answer Key. The Mathematics answer key of class 12th will help students in many ways; they can cross-check their answers with the answer key & can estimate their marks according to that. With these answer keys, they can check their marks before the result gets announced.

As per the Class 12 Term 2 Exam revised scheme. CBSE has conducted the first term exam & is now ready for the term 2 class 2. The Maths Sample Paper Class 12 Term 2 scheme is discussed below:

• The question paper of this sample paper will comprise three sections- A, B & C.
• Section A will comprise six short answer type questions, each carrying two marks.
• Section B will consist of 4 short answer type questions, each with three marks.
• Section C will comprise four long answer-type questions of 4 marks each.
• You can see some questions with some internal choice options in this sample paper.
• There’s a last question, q.14, with two sub-parts of each two marks. ### CBSE 12th Maths Question Paper SET 1 2 3 4

We have provided a sample question paper which is officially released by the Central Board of Secondary Education, below in this article. This sample paper covers all the questions of each set so that students can practice their best for the CBSE 12th Mathematics examination. There will be four sets for the question paper, which students have to attend. There are four different sets which comprises different questions, so that students can not cheat in the examination.

### CBSE 12th Maths Question Paper PDF

We have provided a sample question paper below in this article which can benefit most of the students. Students can practice for their examinations by solving these questions. The Central Board of Secondary Education has officially released these sample papers.

Section A

Q1. If A is a square matrix of order 3, |𝐴′| = −3, then |𝐴𝐴′| =

(a) 9 (b) -9 (c) 3 (d) -3

Q2. If A =[aij] is a skew-symmetric matrix of order n, then

Q3. The scalar projection of the vector 3𝚤̂− 𝚥̂− 2𝑘 on the vector 𝚤̂+ 2𝚥̂− 3𝑘 is

(a) 7/14 (b) 7/14 (c) 6/13 (d) 7/2

Q4. The solution set of the inequality 3x + 5y < 4 is

(a) an open half-plane not containing the origin.

(b) an open half-plane containing the origin.

(c) the whole XY-plane does not contain the line 3x + 5y = 4.

(d) a closed half-plane containing the origin

Q5. Given two independent events A and B such that P(A) =0.3, P(B) = 0.6, and P(𝐴′ ∩ 𝐵′) is

(a) 0.9 (b) 0.18 (c) 0.28 (d) 0.1

(d) at every point of the line segment joining the points (0.6, 1.6) and (3, 0)

Q6. The general solution of the differential equation 𝑦𝑑𝑥 − 𝑥𝑑𝑦 = 0 𝑖𝑠 (a) 𝑥𝑦 = 𝐶 (b) 𝑥 = 𝐶𝑦² (c) 𝑦 = 𝐶𝑥 (d) 𝑦 = 𝐶𝑥²

Q7. The corner points of the shaded unbounded feasible region of an LPP are (0, 4), (0.6, 1.6) and (3, 0), as shown in the figure. The minimum value of the objective function Z = 4x + 6y occurs at

(a)(0.6, 1.6) 𝑜𝑛𝑙𝑦

(b) (3, 0) only

(c) (0.6, 1.6) and (3, 0) only

Q8. If A is a square matrix of order 3 and |A| = 5, then |𝑎𝑑𝑗𝐴| =

(a) 5 (b) 25 (c) 125 (d)1/5

Q9. P is a point on the line joining the points 𝐴(0,5, −2) and 𝐵(3, −1,2). If the x-coordinate of P is 6, then its z-coordinate is

(a) 10 (b) 6 (c) -6 (d) -10

Section B

Q10. A man 1.6 m tall walks at the rate of 0.3 m/sec away from a street light that is 4 m above the ground. At what rate is the tip of his shadow moving? At what rate is his shadow lengthening?

Section C

Q11. Three friends go for coffee. They decide who will pay the bill by each tossing a coin and then letting the “odd person” pay. There is no odd person if all three tosses produce the same result. If there is no odd person in the first round, they make the second round of tosses and continue to do so until there is an odd person. What is the probability that exactly three rounds of tosses are made?

OR

Find the mean number of defective items in a sample of two items drawn one-by-one without replacement from an urn containing 6 items, which include 2 defective items. Assume that the items are identical in shape and size

Section D

Q12. Make a rough sketch of the region {(𝑥, 𝑦): 0 ≤ 𝑦 ≤ 𝑥², 0 ≤ 𝑦 ≤ 𝑥, 0 ≤ 𝑥 ≤ 2} and find the area of the region using integration

Q13. Define the relation R in the set 𝑁 × 𝑁 as follows: For (a, b), (c, d) ∈ 𝑁 × 𝑁, (a, b) R (c, d) if ad = bc. Prove that R is an equivalence relation in 𝑁 × 𝑁. Given a non-empty set X, define the relation R in P(X) as follows: For A, B ∈ 𝑃(𝑋), (𝐴, 𝐵) ∈ symmetric.

SectionE

Q14. Case Study 3: Read the following passage and answer the questions given below. There are two antiaircraft guns, named A and B. The probability that the shell fired from them hits an aeroplane is 0.3 and 0.2, respectively. Both of them fired one shell at an aeroplane at the same time.

(i) What is the probability that the shell fired from precisely one of them hit the plane?

(ii) If it is known that the shell fired from precisely one of them hit the plane, then what is the probability that it was fired from B?

Q15. Case Study 1: Read the following passage and answer the questions given below.

The temperature of a person during an intestinal illness is given by 𝑓(𝑥) = −0.1𝑥² + 𝑚𝑥 + 98, the temperature in °F at x days.

(i) Is the function differentiable in the interval (0, 12)? Justify your answer.

(ii) If 6 is the critical point of the function, then find the value of the constant m.

(iii) Find the intervals in which the function is strictly increasing/strictly decreasing.

Q16. Case Study 2: Read the following passage and answer the questions below.

For an elliptical sports field, the authority wants to design a rectangular soccer field with the maximum possible area. The sports field is given by the graph of 𝑥²/a²+ y²/b² = 1

(i) If the length and the breadth of the rectangular field be 2x and 2y, respectively, then find the area function in terms of x.

(ii) Find the critical point of the function.

(iii) Use the First derivative Test to find the length 2x and width 2y of the soccer field (in terms of a and b) that maximize its area.

OR

(iii) Use Second Derivative Test to find the length 2x and width 2y of the soccer field (in terms of a and b) that maximize its area.

We have mentioned a few steps below, following which you can download CBSE Class 12th Maths sample paper.

• Visit the official site we have mentioned below in this article.
• Search for the notification “Sample question papers of class XII exams 2022-23”.
• Search for the Maths sample question paper.