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

Expert Teacher provides Maths Vector Algebra CBSE 12 Science Solutions for MCQ through Video Solutions 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 Vector Algebra not only to explain the proper method of answering question, but deriving right answer too.

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

** Question:**

** Evaluate the product (3a - 5b).(2a + 7b). **

** Solution Video in** **English****:**

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

**Question 1** : Find |x|, if for a unit vector a,(x - a).(x + a) = 12. (View Answer Video)

**Question 2** : Find the unit vector in the direction of vector PQ, where P and Q are the points (1, 2, 3) and (4, 5, 6) respectively. (View Answer Video)

**Question 3** : Find the angle between the vectors and (View Answer Video)

**Question 4** : Find the direction of the vector (View Answer Video)

**Question 5** : Find the scalar quantities from the following:

(i) 10 kg (ii) 2 m north-west (iii)

(iv) 40 W (v) (vi) (View Answer Video)

**Question 1** : Find : (View Answer Video)

**Question 2** : . (View Answer Video)

**Question 3** : Evaluate : (View Answer Video)

**Question 4** : Evaluate : (View Answer Video)

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

**Question 1** : Find the distance of the point (2, 12, 5) from the point of intersection of the lines and the plane (View Answer Video)

**Question 2** : If the lines and are perpendicular to each other, then find the value of P. (View Answer Video)

**Question 3** : If the cartesian equations of a line are write the vector equation for the line. (View Answer Video)

**Question 4** : Find the angle between the planes 7x + 2y + 6z = 15 and 3x - y + 10z = 17. (View Answer Video)

**Question 5** : Write the sum of intercepts cut off by the plane on the three axes. (View Answer Video)

**Question 1** : If each element of a second-order determinant is either zero or one, what is the probability that the value of the determinant is positive? (View Answer Video)

**Question 2** : 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 3** : A card from a pack of 52 cards is lost. From the remaining cards of the pack, two cards are drawn at random and are found to be hearts. Find the probability of the missing card to be a heart. (View Answer Video)

**Question 4** : If and then find . (View Answer Video)

**Question 5** : A couple has 2 children. Find the probability that both are boys, if it is known that the older child is boy. (View Answer Video)