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Mathematics and Statistics Official Board Paper 2024-2025 HSC Science (General) 12th Standard Board Exam Question Paper Solution

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Mathematics and Statistics [Official Board Paper]
Marks: 80 Maharashtra State Board
HSC Science (General)
HSC Arts (English Medium)
HSC Science (Electronics)
HSC Science (Computer Science)
HSC Arts (Marathi Medium)

Academic Year: 2024-2025
Date & Time: 3rd July 2025, 11:00 am
Duration: 3h
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General instructions:

The question paper is divided into FOUR sections.

  1. Section A: Q.1 contains Eight multiple choice type questions carrying Two marks each.
                      Q.2 contains Four very short answer type questions carrying One mark each.
  2. Section B: Q.3 to Q.14 contain Twelve short answer type questions, each carrying Two marks. (Attempt any Eight)
  3. Section C: Q.15 to Q.26 contain Twelve short answer type questions, each carrying Three marks. (Attempt any Eight)
  4. Section D: Q.27 to Q.34 contain Eight long answer type questions, each carrying Four marks. (Attempt any Five)
  5. Use of log table is allowed. Use of calculator is not allowed.
  6. Figures to the right indicate full marks.
  7. Use of graph paper is not necessary. Only rough sketch of graph is expected.
  8. For each multiple choice type of questions, only the first attempt will be considered for evaluation.
  9. Start answer to each section on a new page.

SECTION - A
[16]1. | Select and write the correct answer of the following multiple choice type of questions:
[2]1. i

Inverse of statement pattern (p ∨ q) → (p ∧ q) is ________ .

(p ∧ q) → (p ∨ q)

∼ (p ∨ q) → (p ∧ q)

(∼p ∧ ∼q) → (∼p ∨ ∼q)

(∼p ∨ ∼q) → (∼p ∧ ∼q)

Concept: undefined - undefined
Chapter: [1] Mathematical Logic
[2]1. ii

In ΔABC, if a = 2, b = 3 and sin A = `2/3`, then ∠B = ______.

`π/2`

`π/3`

`π/4`

`π/6`

Concept: undefined - undefined
Chapter:
[2]1. iii

If `vec(AB) = 2hati - 4hatj + 7hatk` and initial point A ≡ (1, 5, 0) then terminal point B is ______.

(1, 3, 7)

(7, 3, 1)

(1, 7, 3)

(3, 1, 7)

Concept: undefined - undefined
Chapter:
[2]1. iv

The angle between the lines `vecr = (hati + 2hatj + 3hatk) + λ(2hati - 2hatj + hatk)` and `vecr = (hati + 2hatj + 3hatk) + µ(hati + 2hatj + 2hatk)` is ______.

`π/4`

`π/2`

`π/3`

0

Concept: undefined - undefined
Chapter:
[2]1. v

If y is a function of x and log (x + y) = xy then the value of `(dy/dx)` at x = 0 is ______.

1

–1

2

0

Concept: undefined - undefined
Chapter:
[2]1. vi

If the displacement of a particle at time t is given by S = 2t3 – 5t2 + 4t – 3, then its acceleration at time t = 1 is ______.

2

8

10

14

Concept: undefined - undefined
Chapter:
[2]1. vii

The solution of the D.E. sec2x. tan ydx + sec2y tan xdy = 0 is ______.

tan x. cot y = c

cot x – cot y = c

tan x. tan y = c

cot x – tan y = c

Concept: undefined - undefined
Chapter:
[2]1. viii

If X is waiting time in minutes for a bus and its p.d.f. is given by

f(x) `{:(= 1/5",", "for"  0 ≤ x ≤5","),(= 0",", "otherwise"):}`

then the probability that waiting time is between 1 and 3 is ______.

`1/5`

`2/5`

`3/5`

`4/5`

Concept: undefined - undefined
Chapter:
[4]2. | Answer the following questions:
[1]2. i

Find the general solution of tan θ = 0.

Concept: undefined - undefined
Chapter:
[1]2. ii

Find the magnitude of the vector `veca = 3hati + hatj + 7hatk`.

Concept: undefined - undefined
Chapter:
[1]2. iii

Find `dy/dx`, if y = sin (log x).

Concept: undefined - undefined
Chapter:
[1]2. iv

Evaluate: `int 1/sqrt(x) dx`

Concept: undefined - undefined
Chapter:
SECTION - B (16 Marks)
Attempt any EIGHT of the following questions:
[2]3.

Using truth table prove that ~ p ˄ q ≡ ( p ˅ q) ˄ ~ p

Concept: undefined - undefined
Chapter: [1] Mathematical Logic
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[2]4.

Find the cofactors of the elements of the matrix `[(2, -3),(3, 5)]`.

Concept: undefined - undefined
Chapter:
[2]5.

Find the polar coordinates of the point whose cartesian coordinates are `(-sqrt(2), -sqrt(2))`.

Concept: undefined - undefined
Chapter:
[2]6.

In ΔABC, if a = 2, b = 3, c = 4, then prove that the triangle is obtuse angled.

Concept: undefined - undefined
Chapter:
[2]7.

If `veca = 3hati - hatj + 2hatk, hatb = 2hati + hatj - hatk`, then find `|veca xx vecb|`.

Concept: undefined - undefined
Chapter:
[2]8.

Find the cartesian equation of the plane passing through the point A(–1, 2, 3), the direction ratios of whose normal are 0, 2, 5.

Concept: undefined - undefined
Chapter: [6] Line and Plane
[2]9.

Find `dy/dx`, if `xsqrt(x) + ysqrt(y) = asqrt(a)`.

Concept: undefined - undefined
Chapter: [8] Differentiation
[2]10.

Show that the tangent to the curve y = x3 – 6x2 + x + 3 at the point (0, 3) is parallel to the line y = x + 5.

Concept: undefined - undefined
Chapter:
[2]11.

Check whether the conditions of Rolle’s theorem are satisfied by the function f(x) = x2 – 4x + 3, x ∈ [1, 3].

Concept: undefined - undefined
Chapter:
[2]12.

Evaluate: `int dx/(x + x^-10)`.

Concept: undefined - undefined
Chapter:
[2]13.

Evaluate: `int_(0)^(-1) e^-x dx`.

Concept: undefined - undefined
Chapter:
[2]14.

If X ~ B (n, p) and E(X) = 6 and Var (X) = 4.2, then find n and p.

Concept: undefined - undefined
Chapter: [15] Binomial Distribution
SECTION - C (24 Marks)
Attempt any EIGHT of the following questions:
[3]15.

In ΔABC, prove that a2 = b2 + c2 – 2bc cos A.

Concept: undefined - undefined
Chapter:
[3]16.

Find the combined equation of pair of lines passing through (2, 3) and perpendicular to the lines 3x + 2y – 1 = 0 and x – 3y + 2 = 0.

Concept: undefined - undefined
Chapter:
[3]17.

Show that the acute angle θ between the lines represented by ax2 + 2hxy + by2 = 0 is given by, tan θ = `|(2sqrt(h^2 - ab))/(a + b)|`.

Concept: undefined - undefined
Chapter:
[3]18.

By vector method prove that the medians of a triangle are concurrent.

Concept: undefined - undefined
Chapter:
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[3]19.

Find the vector equation of the plane passing through the point A (–1, 2, –5) and parallel to the vectors `4hati - hatj + 3hatk` and `hati + hatj - hatk`.

Concept: undefined - undefined
Chapter:
[3]20.

Find the shortest distance between the lines, `(x - 1)/2 = (y - 2)/3 = (z - 3)/4` and `(x - 2)/3 = (y - 4)/4 = (z - 5)/5`.

Concept: undefined - undefined
Chapter:
[3]21.

Water is being poured at the rate of 27 m3/sec into a cylindrical vessel of base radius 3 m. Find the rate at which the water level is rising.

Concept: undefined - undefined
Chapter:
[3]22.

Evaluate:

`int sin(x+a)/cos(x-b)dx`

Concept: undefined - undefined
Chapter:
[3]23.

Solve the following differential equation:

`dy/dx + y/x = x^3 - 3`

Concept: undefined - undefined
Chapter: [13] Differential Equations
[3]24.

Obtain the differential equation by eliminating the arbitrary constants from y = c1 cos (log x) + c2 sin (log x).

Concept: undefined - undefined
Chapter:
[3]25.

The probability distribution of X is as follows:

x 0  1   2   3   4 
P[X = x] 0.1 k 2k 2k k

Find

  1. k
  2. P(X < 2)
  3. P[1 ≤ X < 4]
Concept: undefined - undefined
Chapter:
[3]26.

In a multiple choice examination with three possible answers for each of the five questions, what is the probability that a candidate would get four correct answers just by guessing?

Concept: undefined - undefined
Chapter:
SECTION - D (20 Marks)
Attempt any FIVE of the following questions:
[4]27.

Give an alternative equivalent simple circuit for the following circuit:

Concept: undefined - undefined
Chapter: [1] Mathematical Logic
[4]28.

The sum of three numbers is 2. If twice of the second number is added to the sum of first and third number we get 0, Adding five times the first number to twice the sum of second and third number we get 7. Find the numbers using matrix method.

Concept: undefined - undefined
Chapter:
[4]29.

Using properties of scalar triple product, prove that `[(bar"a" + bar"b",  bar"b" + bar"c",  bar"c" + bar"a")] = 2[(bar"a",  bar"b",  bar"c")]`.

Concept: undefined - undefined
Chapter:
[4]30.

Solve the following L.P.P. using graphical method:

Maximize, z = 9x + 13y

Subject to, 2x + 3y ≤ 18,

                  2x + y ≤ 10

                  x ≥ 0, y ≥ 0

Concept: undefined - undefined
Chapter:
[4]31.

If x = f(t) and y = g(t) are differentiable functions of t, so that y is a function of x and `dx/dt ≠ 0`, then prove that `dy/dx = ((dy/dt))/((dx/dt))`. Hence find `dy/dx`, if y = at2 and x = 2at.

Concept: undefined - undefined
Chapter:
[4]32.

Prove that: `int sqrt(a^2 - x^2) * dx = x/2 * sqrt(a^2 - x^2) + a^2/2 * sin^-1(x/a) + c`

Concept: undefined - undefined
Chapter: [10] Indefinite Integration
[4]33.

Evaluate: `int_0^(1/2) dx/((1 - 2x^2) * sqrt(1 - x^2))`

Concept: undefined - undefined
Chapter:
[4]34.

Solve the following :

Find the area of the region lying between the parabolas y2 = 4x and x2 = 4y.

Concept: undefined - undefined
Chapter: [12] Application of Definite Integration

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