# Mathematics Cisce-Books Pdf

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viii Find the intervals in which the function is strictly increasing where. ix A family has two children What is the probability that both children are boys. given that at least one of them is a boy, x Given that the events A and B are such that P A P and. P B k Find k if, a A and B are mutually exclusive, b A and B are independent. Question 2, Let R be the set of all positive real numbers and f R. 4 f x x 4 Show, that inverse of f exists and find f 1. Question 3 4, Using properties of determinants prove.
where is any scalar, Question 4 4, Prove that, Question 5 4. a Prove that the function is continuous at x 1 but not. differentiable, b Verify Rolle s Theorem for the following function. Question 6 4, If then show that, ISC SPECIMEN QUESTION PAPER 2018. Question 7 4, a Evaluate, b Evaluate expressing as a limit of sum. Question 8 4, a Find the equations of the normals to the curve which are parallel.
to the line, b A circular disc of radius 3 cm is heated Due to expansion its radius increases at. the rate of 0 05 cm s Find the rate at which its area increases when the radius is. Question 9 4, Solve the following differential equation. Question 10 4, Let X denote the number of hours you study during a randomly selected school day The. probability that X can take the values x has the following form where k is some. unknown constant, 0 1 if x 0, kx if x 1 or 2, k 5 x if x 3 or 4. 0 otherwise, a Find the value of k, b What is the probability that you study.
i at least two hours, ii exactly two hours, iii at most 2 hours. ISC SPECIMEN QUESTION PAPER 2018, Question 11 6, a Evaluate. Hence Solve the system of equations, b Using elementary transformations find the inverse of the matrix. Question 12 6, a Show that the altitude of a right circular cone of maximum volume that can be. inscribed in a sphere of radius r is, b An open topped box is to be made by removing equal squares from each corner of a.
3 m by 8 m rectangle sheet of aluminium and by folding up the sides Find the. volume of the largest such box, Question 13 6, Question 14 6. A B and C throw a die one after the other in the same order till one of them gets a 6. and wins the game Find their respective probability of winning if A starts the game. ISC SPECIMEN QUESTION PAPER 2018, SECTION B 20 Marks. Question 15 6, a Find the area of the parallelogram whose adjacent sides are given by the vectors. b Find the angle between the line and the plane 4, c Find the Cartesian equation of the line passing through the points. Question 16 4, a Show that, b Show that, Question 17 4.
a Find the shortest distance between the lines and. b Find the cartesian equation of the plane passing through the intersection of the. and and at a unit distance from, Question 18, Using integration find the area of the following region 6. ISC SPECIMEN QUESTION PAPER 2018, SECTION C 20 Marks. Question 19 6, a Find the cost of increasing from 100 to 200 units if the marginal cost in Rupees. per unit is given by the function MC 0 003 x2 0 01 x 2 5. b If two lines of regression are 4x 2y 3 0 and 3x 6y 5 0 find the correlation. coefficient between x and y, c The total variable cost of manufacturing x units in a firm is 3 Show that. average variable cost increases with output, Question 20 4.
a Given that the observations are 9 4 10 3 11 1 13 1 14 3 15 5. 16 8 find the two lines of regression Estimate the value of y when x 13 5. b Find the regression coefficient byx and bxy and the two lines of regression for the. following data, X 2 6 4 7 5, Y 8 8 5 6 2, Also compute the correlation coefficient. Question 21 4, a If the demand function is given by x where the price is per unit. and the manufacturer produces x unit per week at the total cost of x2 78x. 2500 find the value of x for which the profit is maximum. b The fixed cost of new product is 35000 and the variable cost per unit is 500. If the demand function 5000 100 find the break even value s. Question 22 6, A toy company manufactures two types of dolls A and B Market test and available. resources have indicated that the combined production level should not exceed. 1200 dolls per week and the demands for the dolls of type B is atmost half of that for. dolls of type A Further the production level of type A can exceed three times the. production of dolls of other type by at most 600 units If the company makes profit of. 12 and 16 per doll respectively on dolls A and B how many of each type of dolls. should be produced weekly in order to maximise the profit. ISC SPECIMEN QUESTION PAPER 2018 MATHEMATICS Maximum Marks 100 Time allowed Three hours Candidates are allowed additional 15 minutes for only reading the paper They must NOT start writing during this time The Question Paper consists of three sections A B and C Candidates are required to attempt all questions from Section A and all questions EITHER from Section B OR Section C

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