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

Expert Teacher provides Maths 12 Science CBSE Matrices Answers for MCQ 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:**

** 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, if and . (View Answer Video)

**Question 2** : Find the value of x from the equation: . (View Answer Video)

**Question 3** : Find the value of c from the equation: . (View Answer Video)

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

**Question 5** : Find the transpose of the matrix: . (View Answer Video)

**Question 1** : A bag A contains 4 black and 6 red balls and bag B 7 black and 3 red balls. A die is thrown. If 1 or 2 appears on it, then bag A is chosen, otherwise bag B. It two balls are drawn at random (without replacement) from the selected bag, find the probability of one of them being red and another black. (View Answer Video)

**Question 2** : A bag contain 2 red, 6 black and 8 green balls. A ball is drawn at random from the bag. Find the probability of black balls:

(View Answer Video)

**Question 3** : Find the mean, the variance and the standard deviation of the number of doublets in three throws of a pair of dice. (View Answer Video)

**Question 4** : There are three coins. One is a two-headed coin (having head on both faces), another is a biased coin that comes up heads 75% of the times and third is also a biased coin that comes up tails 40% of the times. One of the three coins is chosen at random and tossed, and it shows heads. What is the probability that it was the two-headed coin? (View Answer Video)

**Question 5** : 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 1** : If the lines and are perpendicular to each other, then find the value of P. (View Answer Video)

**Question 2** : If a line has direction ratios 2, -1, -2, then what are its direction cosines? (View Answer Video)

**Question 3** : Write the sum of intercepts cut off by the plane on the three axes. (View Answer Video)

**Question 4** : Find the vector and cartesian equations of the plane passing through the point (-1, 3, 2) and perpendicular to each of the planes x + 2y +3z = 5 and

3x + 3y + z = 0. (View Answer Video)

**Question 5** : Find the equation of the plane passing through the line of intersection of the plane and which is at a unit distance from the origin. (View Answer Video)

**Question 1** : Let * be the binary operation on N given by a * b = LCM of a and b. Find the identity of * in N. (View Answer Video)

**Question 2** : Functions are defined respectively, by , find . (View Answer Video)

**Question 3** : Let R be the relation on the set N given by R ={(a, b): a = b - 2, b > 6}. Choose the correct answer. (View Answer Video)

**Question 4** : A function is surjective if and only if , (View Answer Video)

**Question 5** : be defined as f(x) = (View Answer Video)