**Attempt all Question From Question 1 to Question 4**

**Attempt Any Four From Question 5 to Question 11**

if A = `[(3,1),(-1,2)]` and `I = [(1,0),(0,1)]`, find `A^2 - 5A + 7I`

Concept: Matrices Examples

The monthly pocket money of Ravi and Sanjeev are in the ratio 5:7. Their expenditures are in the ratio 3:5. If each saves Rs. 80 every month, find their monthly pocket money.

Concept: Quadratic Equations

Using the Remainder Theorem factorise completely the following polynomial.

3x^{3} + 2x^{2} – 19x + 6

Concept: Remainder Theorem

On what sum of money will the difference between the compound interest and simple interest for 2 years be equal to Rs. 25 if the rate of interest charged for both is 5% p.a.?

Concept: Compound Interest as a Repeated Simple Interest Computation with a Growing Principal

ABC is an isosceles right-angled triangle with ∠ABC = 90°. A semi-circle is drawn with AC as the diameter. If AB = BC = 7 cm, find the area of the shaded region. [Take Π = 22/7]

Concept: Perimeter and Area of a Circle

Given a line segment AB joining the points A(–4, 6) and B(8, –3). Find

1) The ratio in which AB is divided by y-axis.

2) Find the coordinates of the point of intersection.

3) The length of AB.

Concept: Distance Formula

In the given figure O is the centre of the circle and AB is a tangent at B. If AB = 15 cm and AC = 7.5 cm. Calculate the radius of a circle.

Concept: Tangent to a Circle

Evaluate without using trigonometric tables:

`cos^2 26^@ + cos 64^@ sin 26^@ + (tan 36^@)/(cot 54^@)`

Concept: Trigonometric Identities

Marks obtained by 40 students in a short assessment is given below, where a and b are two missing data.

Marks | 5 | 6 | 7 | 8 | 9 |

Number of Students | 6 | a | 16 | 13 | b |

If the mean of the distribution is 7.2, find a and b.

Concept: Measures of Central Tendency - Mean, Median, Mode for Raw and Arrayed Data

Kiran deposited Rs. 200 per month for 36 months in a bank’s recurring deposit account. If the bank pays interest at the rate of 11% per annum, find the amount she gets on maturity.

Concept: Computation of Interest

Two coins are tossed once. Find the probability of getting

1) 2 heads

2) at least 1 tail.

Concept: Simple Problems on Single Events

Using graph paper and taking 1 cm = 1 unit along both x-axis and y-axis.

1) Plot the points A(–4, 4) and B(2, 2).

2) Reflect A and B in the origin to get the images A’ and B’ respectively.

3) Write down the coordinates of A’ and B’.

4) Give the geometrical name for the figure ABA’B’.

5) Draw and name its lines of symmetry.

Concept: Lines of Symmetry

In the given figure, AB is the diameter of a circle with centre O. ∠BCD = 130o. Find:

1) ∠DAB

2) ∠DBA

Concept: Cyclic Properties

Given `[(2, 1),(-3,4)] X = [(7),(6)]. Write

1) The order of the matrix X

2) The matrix X.

Concept: Matrices Examples

A page from the Savings Bank Account of Mr Prateek is given below:

Date |
Particulars |
Withdrawal(In Rs.) |
Deposit(In Rs.) |
Balances(In Rs.) |

January 1st, 2006 | B/F | - | - | 1270 |

January 7th, 2006 | By Cheque | - | 2310 | 3580 |

March 9th, 2006 | To Self | 2000 | - | 1580 |

June 26th, 2006 | By Cash | - | 6200 | 7780 |

June 10th 2006 | To Cheque | 4500 | - | 3280 |

July 15th, 2006 | By Clearing | - | 2630 | 5910 |

October 18th, 2006 | To Cheque | 530 | - | 5380 |

October 27th, 2006 | To Self | 2690 | - | 2690 |

November 3rd, 2006 | By Cash | - | 1500 | 4190 |

December 6th, 2006 | To Cheque | 950 | - | 3240 |

December 23rd, 2006 | By Transfer | - | 2920 | 6260 |

If he receives Rs. 198 as interest on 1st January 2007, find the rate of interest paid by the bank.

Concept: Types of Accounts

The printed price of an article is Rs. 60,000. The wholesaler allows a discount

of 20% to the shopkeeper. The shopkeeper sells the article to the customer at the

printed price. Sales tax (under VAT) is charged at the rate of 6% at every stage. Find:

(1) The cost to the shopkeeper inclusive of tax.

(2) VAT paid by the shopkeeper to the Government.

(3) The cost to the customer inclusive of tax.

Concept: Computation of Tax

Solve the following inequation and represent the solution set on the number line:

4x - 19 < (3x)/5 - 2 <= (-2)/5 + x, x ∈ R

Concept: Representation of Solution on the Number Line

Without solving the following quadratic equation, find the value of m for which the given equation has equation has real and equal roots.

`x^2 + 2(m - 1)x + (m + 5) = 0`

Concept: Quadratic Equations

A hollow sphere of internal and external radii 6 cm and 8 cm respectively is melted and recast into small cones of base radius 2 cm and height 8 cm. Find the number of cones.

Concept: Heights and Distances - Solving 2-D Problems Involving Angles of Elevation and Depression Using Trigonometric Tables

Solve the following equation and give your answer correct to 3 significant figure:

`5x^2 - 3x - 4 = 0`

Concept: Quadratic Equations

As observed from the top of an 80 m tall lighthouse, the angles of depression of two ships on the same side of the lighthouse of the horizontal line with its base are 30° and 40° respectively. Find the distance between the two ships. Give your answer correct to the nearest meter.

Concept: Trigonometric Identities

A man invests Rs. 9600 on Rs. 100 shares at Rs. 80. If the company pays him 18%

dividend find:

(1) The number of shares he buys.

(2) His total dividend.

(3) His percentage return on the shares

Concept: Shares and Dividends

In the given figure ΔABC and ΔAMP are right angled at B and M respectively. Given AC = 10 cm, AP = 15 cm and PM = 12 cm.

1) Prove ΔABC ~ ΔAMP

2) Find AB and BC.

Concept: Similarity of Triangles

if x = `(sqrt(a + 1) + sqrt(a-1))/(sqrt(a + 1) - sqrt(a - 1))` using properties of proportion show that `x^2 - 2ax + 1 = 0`

Concept: Componendo and Dividendo Properties

The line through A(–2, 3) and B(4, b) is perpendicular to the line 2x – 4y = 5. Find the value of b.

Concept: Slope of a Line

Prove that `(tan^2 theta)/(sec theta - 1)^2 = (1 + cos theta)/(1 - cos theta)`

Concept: Trigonometric Identities

A car covers a distance of 400 km at a certain speed. Had the speed been 12 km/h more, the time taken for the journey would have been 1 hour 40 minutes less. Find the original speed of the car.

Concept: Quadratic Equations

Construct a triangle ABC in which base BC = 6 cm, AB = 5.5 cm and ∠ABC = 120°.

Construct a circle circumscribing the triangle ABC.

Draw a cyclic quadrilateral ABCD so that D is equidistant from B and C.

Concept: Circumscribing and Inscribing a Circle on a Triangle

The following distribution represents the height of 160 students of a school.

Height (in cm) |
No. of Students |

140 – 145 | 12 |

145 – 150 | 20 |

150 – 155 | 30 |

155 – 160 | 38 |

160 – 165 | 24 |

165 – 170 | 16 |

170 – 175 | 12 |

175 – 180 | 8 |

Draw an ogive for the given distribution taking 2 cm = 5 cm of height on one axis and 2 cm = 20 students on the other axis. Using the graph, determine:

(1) The median height.

(2) The interquartile range.

(3) The number of students whose height is above 172 cm.

Concept: Measures of Central Tendency - Mean, Median, Mode for Raw and Arrayed Data

In triangle PQR, PQ = 24 cm, QR = –7 cm and ∠PQR = 90°. Find the radius of the inscribed circle.

Concept: Circumscribing and Inscribing a Circle on a Triangle

Find the mode and median of the following frequency distribution

x | 10 | 11 | 12 | 13 | 14 | 15 |

f | 1 | 4 | 7 | 5 | 9 | 3 |

Concept: Measures of Central Tendency - Mean, Median, Mode for Raw and Arrayed Data

The line through P(5, 3) intersects y-axis at Q.

(1) Write the slope of the line.

(2) Write the equation of the line.

(3) Find the coordinates of Q.

Concept: Slope of a Line