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

Expert Teacher provides 12 Science Maths CBSE Relations and Functions 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 Relations and Functions 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:**

** Let A = {1, 2, 3}. Then, number of equivalence relations containing (1, 2) are, **

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

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

**Question 1** : Let defined as f(x) = x be an identity function. Then, (View Answer Video)

**Question 2** : Number of binary operations on the set {a, b} are : (View Answer Video)

**Question 3** : A function defined as f(x) = 5x is, (View Answer Video)

**Question 4** : Let be defined as . Choose the correct answer. (View Answer Video)

**Question 5** : Let * be the binary operation on N given by a * b = LCM of a and b. Find 5 * 7. (View Answer Video)

**Question 1** : Differentiate the function w.r.t.x . (View Answer Video)

**Question 2** : Find for the function . (View Answer Video)

**Question 3** : Using the fact that and the differentiation, obtain the sum formula for cosines. (View Answer Video)

**Question 4** : Differentiate the function w.r.t.x . (View Answer Video)

**Question 5** : Differentiate the function w.r.t.x . (View Answer Video)

**Question 1** : Evaluate the determinants:. (View Answer Video)

**Question 2** : If a, b, c are in AP, then determinant . (View Answer Video)

**Question 3** : Let A be the non- singular square matrix of order , then |adj A| is equal to, (View Answer Video)

**Question 4** : The solution of the following system of equation is 2x + 3y = 5, 5x – 2y = 3. (View Answer Video)

**Question 5** : If=andis Cofactor of , then the value of is given by (View Answer Video)

**Question 1** : 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 2** : One card is drawn from a pack of 52 cards. Find the probability of getting a red card:

(View Answer Video)

**Question 3** : A speaks truth in 75% of the cases, while B in 90% of the cases. In what percent of cases are they likely to contradict each other in stating the same fact? Do you think that statement of B is always true? (View Answer Video)

**Question 4** : 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 5** : 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)