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General Instructions:
(i) All questions are compulsory.
(ii) The question paper consists of 25 questions divided into three sections A, B and C. Section A comprises of 7 questions of two marks each, Section B comprises of 12 questions of three marks each, and Section C comprises of 6 questions of five marks each.
(iii) Use of calculators is not permitted.
Question 1
  • Q1

    Find the L.C. M. of x3 + x2 + x + 1 and x4 − 1.

     

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  • Q2

    Solve for x and y:

    8x − 9y = 6xy

    10x + 6y = 19xy

    OR

    Solve for x and y:

     

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  • Q3

    In an A.P., the sum of its first n terms is n2 + 2n.  Find its 18th term.

     

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  • Q4

    In the following figure, two circles touch each other externally at C. Prove that the common tangent at C bisects the other two common tangents.

    OR

    D is any point on the side BC of a ΔABC such that ADC = BAC. Prove that

    CA2 = BC.CD.

     

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  • Q5

    Find the mean of the following distribution:

    Class

    Frequency

    0 − 10

    8

    10 − 20

    12

    20 − 30

    10

    30 − 40

    11

    40 − 50

    9

     

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  • Q6

    A ceiling fan is marked at Rs 970 cash or for Rs 210 as cash down payment followed by three equal monthly instalments of Rs 260. Find the rate of interest charged under the instalment plan.

     

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  • Q7

    A box contains 5 red balls, 4 green balls, and 7 white balls. A ball is drawn at random from the box. Find the probability that the ball drawn is

    (a) White

    (b) Neither red nor white

     

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  • Q8

    Solve the following system of linear equations graphically:

    2x + 3y = 12

    2y − 1 = x

     

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  • Q9

    Simplify:

     

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  • Q10

    The first term, common difference, and last term of an A.P are 12, 6, and 252 respectively. Find the sum of all terms of this A.P.

     

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  • Q11

    BC is a chord of a circle with centre O. A is a point on arc BAC as shown in the figure. Prove that BAC + OBC = 90°

     

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  • Q12

    Draw a circle of radius 4.5 cm. At a point A on it, draw a tangent to the circle without using the centre.

     

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  • Q13

    A toy in the form of a cone is mounted on a hemisphere with same radius. The diameter of the base of the conical portion is 7 cm and the total height of the toy is 14.5 cm. Find the volume of the toy.

     

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  • Q14

    The expenditure on different heads of a household (in hundreds of rupees) is as follows:

    Head

    Education

    Games

    Entertainment

    Gardening

    Decoration

    Expenditure

    20

    10

    15

    10

    17

    Draw a pie diagram to represent the above data.

     

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  • Q15

    All the three face cards of spades are removed from a well-shuffled pack of 52 cards. A card is then drawn at random from the remaining pack. Find the probability of getting (a) a black face card, (b) a queen, (c) a black card.

     

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  • Q16

    Prove that

    OR

    Evaluate without using trigonometric tables.

    tan 7°.tan 23°.tan 60°.tan 67°.tan 83° + + sin 20°.sec 70° − 2

     

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  • Q17

    Three consecutive vertices of a parallelogram are (2, 1), (1, 0), and (4, 3). Find the coordinates of the fourth vertex.

     

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  • Q18

    If the point C (1, 2) divides internally the line segment AB in the ratio 3: 4, where the coordinates of A are (2, 5), then find the coordinates of B.

     

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  • Q19

    A loan of Rs 2550 is to be paid back in two equal half-yearly instalments. How much is each instalment if interest is compounded half-yearly at 8% per annum?

     

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  • Q20

    Prove that the ratio of the areas of two similar triangles is equal to the ratio of the squares of their corresponding sides.

    Use the above for the following:

    If the areas of two similar triangles are equal, then prove that they are congruent.

     

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  • Q21

    If a line touches a circle and from the point of contact a chord is drawn, then prove that the angles which this chord makes with the given line are equal respectively to the angles formed in the corresponding alternate segments.

    Use the above for the following: In the given figure, ABCD is a cyclic quadrilateral and PQ is the tangent to the circle at C. If BD is the diameter, DCQ = 40° and ABD = 60°, then find

     (i) ADB

    (ii) BCP

     

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  • Q22

    The numerator of a fraction is one less than its denominator. If three is added to each of the numerator and denominator, then the fraction is increased by . Find the fraction.

    OR

    The difference of squares of two natural numbers is 45. The square of the smaller number is four times the larger number. Find the numbers.

     

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  • Q23

    A hemispherical bowl of internal diameter 36 cm is full of some liquid. This liquid is to be filled in cylindrical bottles of radius 3 cm and height 6 cm. Find the number of bottles needed to empty the bowl.

    OR

    Water flows out through a circular pipe whose internal radius is 1 cm at the rate of

    80 cm/second into an empty cylindrical tank, the radius of whose base is 40 cm. By

    how much will the level of water rise in the tank in half an hour?

     

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  • Q24

    A pole 5 m high is fixed on the top of a tower. The angle of elevation of the top of the pole observed from a point A on the ground is 60° and the angle of depression of point A from the top of the tower is 45°. Find the height of the tower. (Take = 1.732)

     

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  • Q25

    The salary of Hukam Singh is Rs 42,000 per month (exclusive of HRA). He donates Rs 30,000 to Prime Minister’s Relief Fund (100% exemption). He contributes Rs 6,500 per month towards Provident Fund and Rs 5,000 quarterly towards LIC premium. He also purchases NSC worth Rs 10,000. He pays income tax of Rs 5,100 per month for 11 months. Calculate the income tax he has to pay in the 12th month of the year. Use the following to calculate income tax:

    (a)      Savings 100% exemption for permissible savings up to Rs 1,00,000

    (b) Rates of Income tax

    Slab

    Income tax

    Up to Rs 1,00,000

    No tax

    From Rs 1,00,001 to Rs 1,50,000

    10% of the taxable income exceeding Rs 1,00,000

    From Rs 1,50,001 to Rs 2,50,000

    Rs 5,000 + 20% of the amount exceeding Rs 1,50,000

    Rs 2,50,001 and above

    Rs 25,000 + 30% of the amount exceeding Rs 2,50,000

    (c)      Education Cess 2% of Income tax

     

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