12 Science Maths CBSE Answers for MCQ Probability in English

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

Question 1 :  A man is known to speak the truth 3 out of 5 times. He throws a die and reports that it is 1. Find the probability that it is actually 1.   (View Answer Video)

Question 2 :  In a group of 400 people, 160 are smokers and non-vegetarian, 100 are smokers and vegetarian and the remaining are non-smokers and vegetarian. The probabilities of getting a special chest disease are 35%, 20% and 10% respectively. A person is chosen from the group at random and is found to be suffering from the disease. What is the probability that the selected person is a smoker and non-vegetarian? What value is reflected in this question?     (View Answer Video)

Question 3 : If P(F) = 0.35 and =0.85 and E and F are independent events. Find P(E).  (View Answer Video)

Question 4 :  Four cards are drawn successively with replacement from a well shuffled deck of 52 cards. What is the probability that:
 All the four cards are spades?
  (View Answer Video)

Question 5 : 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)

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

Application of Integrals

Question 1 : Find the area of the circle which is interior to the parabola  (View Answer Video)

Question 2 : Find the area of smaller region bounded by the ellipse  and the line . (View Answer Video)

Question 3 : Find the area of the region in the first quadrant enclosed by x-axis, line  and the circle  (View Answer Video)

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

Question 5 : Find the area enclosed by the parabola and the line 2y = 3x + 12.   (View Answer Video)

Application of Derivatives

Question 1 : The total cost C(x) (in Rs) associated with the production of 'x' units of an item is given by :
C (x)=0.005x³-0.02x²+30x+5000.
 Find the marginal cost when 3 units are produced, where by marginal cost we mean the instantaneous rate of change of total cost at any level of output. (View Answer Video)

Question 2 : The normal at the point (1, 1) on the curve  is: (View Answer Video)

Question 3 : The function f is a differentiable function and satisfies the functional equation f(x) + f(y) = f(x + y) – xy – 1for every pair x, y of real numbers. If f(1) = 1, then the number of integers n ≠ 1 for which f(n) = n is_______________. (View Answer Video)

Question 4 : A tank with a rectangular base and rectangular sides, open at the top is to be constructed so that its depth is 2m and volume is If the building of tank costs Rs.70 per sq meter for the base and Rs.45 per sq meter for sides. What is the cost of least expensive? (View Answer Video)

Question 5 : If, then the approximate value of f(3.02) is _________. (View Answer Video)

Three Dimensional Geometry

Question 1 : Write the distance between the parallel planes 2x - y + 3z = 4 and 2x - y + 3z = 18. (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 : Write the equation of the straight line through the point and parallel to z-axis. (View Answer Video)

Question 4 : Find the vector equation of the line passing through the point (1, 2, 3) and parallel to the planes    and
(View Answer Video)

Question 5 : Find the angle between the planes 7x + 2y + 6z = 15 and 3x - y + 10z = 17. (View Answer Video)