Solutions for MCQ CBSE 12 Science Maths Probability in English

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

Expert Teacher provides Solutions for MCQ CBSE 12 Science Maths Probability 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 Probability 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:

Of the students in a college, it is known that 60% reside in hostel and 40% are day scholars (not residing in hostel). Previous year results report that 30% of all students who reside in hostel attain  'A' grade and 20% of day scholars attain 'A' grade in their annual examination. At the end of the year, one student is chosen at random from the college and he has an 'A' grade. What is the probability that the student is a hosteler?  

Solution Video in English:

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

Question 1 : An insurance company insured 2,000 cyclists, 4,000 scooter drivers and 6,000 motorbike drivers. The probability of an accident involving a cyclist, scooter driver and a motorbike driver are 0.01, 0.03, and 0.15 respectively. One of the insured persons meets with an accident. What is the probability that he is a scooter driver?     (View Answer Video)

Question 2 :  Probability of solving specific problem independently by A and B are Question and Question respectively. If both try to solve the problem, independently, then find the probability that exactly one of them solves the problem.  (View Answer Video)

Question 3 : An experiment succeeds thrice as often as it fails. Find the probability that in the next trials, there will be atleast 3 successes.    (View Answer Video)

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Question 5 : 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)

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

Application of Integrals

Question 1 : Using the method of integration find the area of the region bounded by lines:
2x + y = 4, 3x - 2y = 6 and x - 3y + 5 = 0.
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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 bounded by the parabola Question and y = | x |. (View Answer Video)

Question 4 : Find the area bounded by curves Question and Question (View Answer Video)

Question 5 : Find the area of the region enclosed by the parabola Questionthe line y = x + 2. (View Answer Video)

Continuity and Differentiability

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

Question 2 : Differentiate the function Question with respect to x. (View Answer Video)

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

Question 4 : Differentiate the function Question with respect to x. (View Answer Video)

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

Integrals

Question 1 : Question. (View Answer Video)

Question 2 : Evaluate : Question (View Answer Video)

Question 3 : Evaluate : Question (View Answer Video)

Question 4 : Evaluate: Question (View Answer Video)

Question 5 : Given Question . Write f(x) satisfying the above.  (View Answer Video)