CBSE Maths 12 Science Probability MCQ Answers in English

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

Expert Teacher provides CBSE Maths 12 Science Probability MCQ Answers 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 Probability 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.


A couple has 2 children. Find the probability that both are boys, if it is known that the older child is boy.

Answer Video in English:

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

Similar Questions from CBSE, 12th Science, Maths, Probability

Question 1 : A die is thrown 6 times. If 'getting an odd number' is a 'success', what is the probability of obtaining:
atmost 5 successes? (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 : A bag contains (2n+1) coins. It is known that (n-1) of these coins have a head on both sides, whereas the rest of the coins are fair. A coin is picked up at random from the bag and is tossed. If the probability that the toss results in a head is Question, determine the value of n. (View Answer Video)

Question 4 : A bag X contains 4 white balls and 2 black balls, while another bag Y contains 3 white balls and 3 black balls. Two balls are drawn (without replacement) at random from one of the bags and were found to be one white and one black. Find the probability that the balls were drawn from bag Y.  (View Answer Video)

Question 5 : 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)

Questions from Other Chapters of CBSE, 12th Science, Maths

Continuity and Differentiability

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

Question 2 :  Find the second order derivative of the function Question. (View Answer Video)

Question 3 : If x and y are connected parametrically by the equation Question   , without eliminating the parameter, find Question. (View Answer Video)

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

Question 5 : Find the value of k, if the area of the triangle is 4 sq unit and vertices are (-2, 0), (0, 4), (0, k). (View Answer Video)

Application of Derivatives

Question 1 : The approximate change in the volume of a cube of side x meters caused by increasing the side by 3% is, (View Answer Video)

Question 2 : The rate of change of the area of a circle with respect to its radius r at r=6cm is: (View Answer Video)

Question 3 : The line Question is a tangent to the curve Question at the point. (View Answer Video)

Question 4 : The slope of the normal to the curve Question at x = 0 is :
  (View Answer Video)

Question 5 : The line y = x + 1 is a tangent to the curve Question at the point: (View Answer Video)

Application of Integrals

Question 1 : Using integration, find the area bounded by the tangent to the curve Question at the point (2, 1) and the lines whose equations are x = 2y and x = 3y - 3. (View Answer Video)

Question 2 : Using integration, find the area of the triangle ABC, where A is (2,3), B is (4,7) and C is (6,2). (View Answer Video)

Question 3 : Find the area of the region Question. (View Answer Video)

Question 4 : Find the area of the smaller region bounded by the ellipse Question and the straight line 8x + 3y = 12. (View Answer Video)

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