12 Science Maths CBSE Answers for MCQ Matrices in English to enable students to get Answers in a narrative video format for the specific question.

Expert Teacher provides 12 Science Maths CBSE Answers for MCQ Matrices through Video Answers in English language. This video solution will be useful for students to understand how to write an answer in exam in order to score more marks. This teacher uses a narrative style for a question from Matrices not only to explain the proper method of answering question, but deriving right answer too.

Please find the question below and view the Answer in a narrative video format.

** Question:**

** Find the value of y, from the equation: . **

** Answer Video in** **English****:**

You can select video Answers from other languages also. Please check Answers in ( Hindi )

**Question 1** : Find the value of x, from the equation: . (View Answer Video)

**Question 2** : Find the transpose of the matrix: . (View Answer Video)

**Question 3** : Find the transpose of the matrix: . (View Answer Video)

**Question 4** : Matrices A and B will be inverse of each other only if : (View Answer Video)

**Question 5** : Compute: . (View Answer Video)

**Question 1** : Out of a group of 30 honest people, 20 always speak the truth. Two persons are selected at random from the group. Find the probability distribution of the number of selected persons who speak the truth. Also find the mean of the distribution. What values are described in this question? (View Answer Video)

**Question 2** : A man is known to speak the truth 3 out of 5 times. He throws a die and reports that it is 1. Find the probability that it is actually 1. (View Answer Video)

**Question 3** : Three persons A, B and C apply for a job of Manager in a Private company. Chance of their selection (A, B and C) are in the ratio 1:2:4. The probability that A, B, and C can introduce changes to improve profits of company are 0.8, 0.5 and 0.3 respectively, if the changes does not take place, find the probability that is due to the appointment of C. (View Answer Video)

**Question 4** : A and B throw a pair of dice alternately. A wins the game if he gets a total of 9 and B wins if he gets a total of 7. If A starts the game, find the probability of winning the game by B. (View Answer Video)

**Question 5** : An urn contains 4 balls. Two balls are drawn at random from the urn (without replacement) and are found to be white. What is the probability that all the four balls in the urn are white? (View Answer Video)

**Question 1** : If , find in terms of y alone. (View Answer Video)

**Question 2** : Differentiate the function w.r.t.x . (View Answer Video)

**Question 3** : Find for the function . (View Answer Video)

**Question 4** : Differentiate w.r.t.x the function , for some fixed a > 0 and x > 0. (View Answer Video)

**Question 5** : Find the second order derivative of the function . (View Answer Video)

**Question 1** : Write the vector equation of a line passing through the point (1, -1, 2) and parallel to the line whose equations are, (View Answer Video)

**Question 2** : Find the distance between the point (5, 4, -6) and its image in xy-plane. (View Answer Video)

**Question 3** : Find the vector equation of the plane with intercepts 3, -4 and 2 on x, y and z-axis respectively. (View Answer Video)

**Question 4** : Write the distance between the parallel planes 2x - y + 3z = 4 and 2x - y + 3z = 18. (View Answer Video)

**Question 5** : Find the equation of the plane with intercept 3 on the y-axis and parallel to ZOX plane. (View Answer Video)