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# Question Paper Solutions for Algebra Balbharati Model Question Paper Set 1 2018-2019 SSC (Marathi Semi-English) 10th

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Algebra
Balbharati Model Question Paper Set 1
2018-2019 March
Marks: 40

1
1.1 | Solve any four of the following.
1.1.1

Observe the adjacent Venn diagram and write the complement of A. Chapter:  Arithmetic Progression
Concept: Arithmetic Progression Examples and Solutions
1.1.2

Multiply : 2sqrt(12) × sqrt(3)

Chapter:  Arithmetic Progression
Concept: Arithmetic Progression Examples and Solutions
1.1.3

Find the geometric mean of 4 and 25.

Chapter:  Arithmetic Progression
Concept: Geometric Mean
1.1.4

Find x if x + y = 5, and x - y = 7

Chapter:  Arithmetic Progression
Concept: Arithmetic Progression Examples and Solutions
1.1.5

The estimated tax on the income of Shreemati Hinduja is Rs. 8000. How much education cess has she to pay at 3% ?

Chapter:  Arithmetic Progression
Concept: Arithmetic Progression Examples and Solutions
1.1.6

Find the class-mark of 80-90.

Chapter:  Arithmetic Progression
Concept: Arithmetic Progression Examples and Solutions
1.2 | Solve any two of the following
1.2.1

Factorise : m2 + 5x + 6.

Chapter:  Quadratic Equations
Concept: Solutions of Quadratic Equations by Factorization
1.2.2

The sum of two natural numbers is 20 while their difference is 4. Find the numbers.

Chapter:  Quadratic Equations
Concept: Solutions of Quadratic Equations by Factorization
1.2.3

In PQRS, ∠ R = 60°. Find the ratio ∠ R : ∠ Q

Chapter:  Linear equations in two variables
Concept: Linear Equations in Two Variables Applications
2
2.1 | Choose the correct alternative answer and write.
2.1.1

(1) For a simultaneous equation in x and y, if Dx = 25, Dy = 50 and
D = 5, What is the value of x ?

(A) -5

(B) 1/ 5

(C) 10

(D) 5

Chapter:  Linear equations in two variables
Concept: Linear Equations in Two Variables Applications
2.1.2

Which of the following is a quadratic equation ?

(A) 6x2 = 20 - x3

(B) x^2(1/x-2) = 72

(C) 3/x - 3 = 4x^2

(D) 5x + 7 = 3x

Chapter:  Quadratic Equations
Concept: Quadratic Equations Examples and Solutions
2.1.3

If in an A. P., d = 10, find t6 - t2.

(A) 10

(B) 20

(c) 30

(D) 40

Chapter:  Quadratic Equations
Concept: Quadratic Equations Examples and Solutions
2.1.4

The rate of GST on stainless steel is 18%, of which the share of a state government is ...............

(A) 18%

(B) 9%

(C) 36%

Chapter:  Financial Planning
Concept: Shares
2.2 | Solve any two of the following.
2.2.1

Two coins are tossed simultaneously. Find the probability of getting at least one head.

Chapter:  Probability
Concept: Probability Examples and Solutions
2.2.2

If the roots of 2x2 - 6x + k = 0 are real and equal, find k.

Chapter:  Quadratic Equations
Concept: Roots of a Quadratic Equation
2.2.3

Solve the following simultaneous equations.
101x + 99y = 501, 99x + 101y = 499

Chapter:  Linear equations in two variables
Concept: Introduction of System of Linear Equations in Two Variables
3
3.1 | Solve any two of the following.
3.1.1

The first term of an A. P. is 5 and the common difference is 4. Complete the following activity and find the sum of the first 12 terms of the A. P.

a = 5, d = 4, s12 = ?
s_n = n/2 [ square ]
s_12 = 12/2 [10 +square]
= 6 × square
 =square

Chapter:  Arithmetic Progression
Concept: Sum of First n Terms of an AP
3.1.2

Complete the following activity to solve the simultaneous equations
3x + 2y = 6 and 2x + 4y = 12 by cramer's method.

D = [[ 3,2] ,[2, 4  ]] = 8  Dx = [[6,2],[12,4]] = square , Dy = [[3,6],[2,12]] = square  x= square   y = square

Chapter:  Linear equations in two variables
Concept: Cramer'S Rule
3.1.3

The six faces of a die are marked
The event M is getting a vowel on the upper face of the die when it is tossed. Complete the following activity and find the probability of the event.

  S = {square}
n(S) =square
 M = {square}
n(M) =square
P(M) = square/square=square

Chapter:  Probability
Concept: Probability of an Event
3.2 | Solve any two of the following.
3.2.1

The following table shows the percentages of vehicles passing a signal. Find out the measures of central angle to show the information by a pie diagram and hence draw the pie diagram.

 Type of Vehicle Bicycle Two wheeler Car Bus Rickshaw Percentage 10 30 20 20 20
Chapter:  Statistics
Concept: Pie Diagram
3.2.2

Mr. Mahajan purchased 100 shares, each of face value Rs. 100, when the market price was Rs. 45 per share, paying 2% brokerage. If the rate of GST on the brokerage is 18%, find the total amount he spent.

Chapter:  Financial Planning
Concept: Brokerage and taxes on share tradin
3.2.3

There are 25 rows of seats in an auditorium. The first row is of 20 seats, the second of 22 seats, the third of 24 seats, and so on. How many chairs are there in the 21st row ?

Chapter:  Arithmetic Progression
Concept: Sum of First n Terms of an AP
4 | Solve any three of the following.
4.1

Solve : 7y = -3y2 - 4

Chapter:  Quadratic Equations
Concept: Roots of a Quadratic Equation
4.2

In a game of chance, the spinning arrow rests at one of the numbers 1, 2, 3, 4, 5, 6, 7, 8. All these are equally likely outcomes. Find the probabilities of the following events.
(A) The arrow rests at an odd number.
(B) It rests at a prime
number.
(C) It rests at a multiple
of 2.

Chapter:  Probability
Concept: Equally Likely Outcomes
4.3

Find out the sum of all natural numbers between 1 and 145 which are divisible by 4.

Chapter:  Arithmetic Progression
Concept: Sum of First n Terms of an AP
4.4

The following frequency distribution table shows the number of mango trees in a grove and their yield of mangoes, and also the cumulative frequencies. Find the median of the data.

 Class(No. of mangoes) Frequency(No. of trees) Cumulative frequency (less than) 50-100 33 33 100-150 30 63 150-200 90 153 200-250 80 233 250-300 17 250
Chapter:  Statistics
Concept: Median of Grouped Data
5 | Solve any one of the following.
5.1

Six year before, the age of mother was equal to the square of her son's age. Three year hence, her age will be thrice the age of her son then. Find the present ages of the mother and son.

Chapter:  Arithmetic Progression
Concept: General Term of an Arithmetic Progression
5.2

Draw a frequency polygon from the information given in the following table.

 Age of blood donar (Years) No. of blood donars Less than 20 0 Less than 25 30 75Less than 30 75 165Less than 35 127 Less than 40 165 Less than 45 185 Less than 50 197
Chapter:  Statistics
Concept: Frequency Polygon
6 | Solve any one of the following.
6.1

Draw the graph of x + y = 6 which intersects the X-axis and the Y-axis at A and B respectively. Find the length of seg AB. Also, find the area of Δ AOB where point O is the origin.

Chapter:  Linear equations in two variables
Concept: Graphical Method of Solution of a Pair of Linear Equations
6.2

The market value of a mutual fund is 400 crore rupees. Which is divided into 8 crore units.

(a) Suppose you invest Rs. 10,000 in the units, how many units will you
get ?
(b) While selling the units if their market value is increased by 10%,
how much amount will you get by selling them ?

Chapter:  Financial Planning
Concept: Mutual Fund - MF

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