Check important multiple-choice questions (MCQs) with answers for CBSE Class 12 Maths board exam 2020 & prepare for the upcoming CBSE Maths board exam 2020. The CBSE Class 12th Mathematics Board Examination 2020 will be held on March 17, 2020. The students will find the below-mentioned questions and answers helpful for the upcoming CBSE Class 12th Mathematics Board Examination 2020.
CBSE Class 12th Mathematics Board Examination 2020 MCQ’s:
Question 1- If A is a square matrix of 3 x 3 order, where |A| = 3, then find out the value of |adjA|.
Question 2- If A and B are two events, where P (A) = 0.2, P (B) = 0.4 and P(A ∪ B) = 0.5. Find the value of P(A/B).
Question 3- Which point does not lie in the half-plane for the given equation: 2x + 3y - 12 ≤ 0?
Question 4- Find the value of cos-1 x + cos-1 y, if sin-1 x + sin-1 y = 2π/ 3.
Question 5- Calculate the distance in units between the below-mentioned planes:
3x + 5y + 7z = 3 and 9x + 15y + 21z = 9.
Question 5- An urn has 6 balls out of which 4 balls are black and 2 balls are red. Two balls are drawn at random. What is the probability that the ball drawn are of different colours?
- p = 6, q = 27
- p = 3, q = 27/2
- p = 6, q = 27/2
- p = 3, q = 27
Answer: p = 3, q = 27/2
Question 7- Let P and Q be two different matrices of 3 x n and n x p order. Find out the order of P x Q matrix.
- 3 x p
- p x 3
- n x n
- 3 x 3
Answer: 3 x p
Question 10- Let A and B be invertible matrices of order 3, |A| = 2 and | (AB) -1| = -1/6.Find the value of |B|.
CBSE Class 12th Mathematics Board Examination 2020 fill in the blanks:
Question 11- Suppose f to be the greatest integer function and is defined as f(x) = [x] and g be the modulus function defined as g(x) = |x| , the value of g of (-5/4) will be ___.
Question 12- If the tangent to the curve y2 + 3x - 7 = 0 at the pt. (h,k) and is parallel to the line x - y = 4, the value of k will be ___.
Answer: 2 units.
Question 16- For the curve y = 5x - 2x3, if x is increasing at 2 units/sec, then at x = 3, the slope of the curve will change at ____?
Answer: decrease at the rate of 72 units/sec.
CBSE Class 12th Mathematics Board Examination 2020 short answer type questions:
Answer: Yes, (l + m + n) is a factor.
Question 19- What will be the general solution of the differential equation dy/dx = e x + y?
Answer: ex + e-y = c
Question 20- Find the value of ∫xe (1 + x2)dx.
Answer: 1/2 e(1 + x2) + c.
Question 22- Evaluate ∫ (cos22x - sin22x) dx.
Answer: 3 log |(x + sin x)| + c
Question 24- Differentiate: sin2 (x2) w.r.t x2.
Answer: 2sin(x2) cos(x2) or sin(2x2)
Question 25- Find the direction cosines of the line given below:
These were the short answer type questions which are based on the latest CBSE pattern. The students appearing for the CBSE Class 12th Mathematics Examination 2020 must go through the links mentioned below: