ISC Maths Semester-2 Solved Specimen Paper 2022 Class-12 for practice.  Step by step solutions of ISC Class-12 specimen model sample paper. During solutions of semester-2 Maths specimen paper we explain with figure , graph, table whenever necessary so that student can achieve their goal in next upcoming exam of council .

## ISC Maths Semester-2 Solved Specimen Paper 2022 Class-12

 Board ISC Class 12th (XII) Subject Maths Topic Semester-2 ISC Specimen Paper Solved Syllabus on bifurcated syllabus (after reduction) session 2021-22 Question Type Descriptive Type  (as prescribe by council) Total question Total-14 (Section A, B & C) Max mark 40

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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### Solved Class-12 for practice Set of Maths Semester-2 ISC Specimen Model Sample Paper

SECTION A – 32 MARKS

#### Question 1:

Choose the correct option for the following questions.

(i) If then the value of 𝑘 is:

(a) 3

(b) 2

(c) 1

(d) None of the above options

(ii) then the value of 𝑘 is:

(a) 𝑎

(b) 2𝑎

(c) Independent of 𝑎

(d) None of the above options

(iii) The degree of the differential equation is:

(a) 1

(b) 2

(c) 3

(d) 4

(iv) Given Then 𝑓(𝑥) satisfying the equation is:

(a) 𝑥

(b) 𝑥²

(c) 1/𝑥

(d) None of the above options

(v) Two cards are drawn out randomly from a pack of 52 cards one after the other, without replacement. The probability of first card being a king and second card not being a king is:

(a) 48/663

(b) 24/663

(c) 12/663

(d) 4/663

(vi) If two balls are drawn from a bag containing 3 white, 4 black and 5 red balls. Then, the probability that the drawn balls are of different colours is:

(a) 1/66

(b) 3/66

(c) 19/66

(d) 47/66

#### Question 2:

(a) Evaluate :

OR

(b) Evaluate : ∫ log10 𝑥 𝑑𝑥

#### Question 3:

(a) Solve the differential equation :

𝑐𝑜𝑠𝑒𝑐³𝑥𝑑𝑦 − cosec 𝑦 𝑑𝑥 = 0

OR

(b) Solve the differential equation :

𝑑𝑦/𝑑𝑥 = 2−𝑦

Evaluate :

#### Question 5:

(a) A bag contains 6 red and 5 blue balls and another bag contains 5 red and 8 blue balls. A ball is drawn from the first bag and without noticing its colour is placed in the second bag. If a ball is drawn from the second bag, then find the probability that the drawn ball is red in colour.

OR

(b) A bag contains 3 red and 4 white balls and another bag contains 2 red and 3 white balls. If one ball is drawn from the first bag and 2 balls are drawn from the second bag, then find the probability that all three balls are of the same colour.

Evaluate :

#### Question 7:

In a bolt factory, machines X, Y and Z manufacture 20%, 35% and 45% respectively of the total output. Of their output 8%, 6% and 5% respectively are defective bolts. One bolt is drawn at random from the product and is found to be defective. What is the probability that it was manufactured in the machine Y?

(a) Evaluate:

or

(b) Evaluate :

### SECTION B – 8 MARKS

ISC Maths Semester-2 Solved Specimen Paper 2022 Class-12

#### Question 9:

Choose the correct option for the following questions.

(i) The equation of the plane which is parallel to 2𝑥 − 3𝑦 + 𝑧 = 0 and which passes through (1, −1, 2) is:

(a) 2𝑥 − 3𝑦 + 𝑧 − 7 = 0

(b) 2𝑥 − 3𝑦 + 𝑧 + 7 = 0

(c) 2𝑥 − 3𝑦 + 𝑧 − 8 = 0

(d) 2𝑥 − 3𝑦 + 𝑧 + 6 = 0

(ii) The intercepts made on the coordinate axes by the plane 2𝑥 + 𝑦 − 2𝑧 = 3 are:

(a) (−3/2), −3, (−3/2)

(b) (3/2), 3, (−3/2)

(c) (3/2), −3,(−3/2)

(d) (3/2) , 3, (3/2)

#### Question 10:

Find the equation of the plane passing through the point (1, 1, 1) and is perpendicular to the line (𝑥−1/3) = (𝑦−2/0) =  (𝑧−3/4) . Also, find the distance of this plane from the origin.

#### Question 11:

Using integration, find the area of the region bounded between the line 𝑥 = 4 and the parabola 𝑦² = 16𝑥.

SECTION C – 8 MARKS

### Semester-2 Solved Specimen Paper 2022 Class-12 ISC Maths

Question 12:

Choose the correct option for the following questions.

(i) If the regression line of 𝑥 𝑜𝑛 𝑦 is, 9𝑥 + 3𝑦 − 46 = 0 and 𝑦 𝑜𝑛 𝑥 is, 3𝑥 + 12𝑦 − 7 = 0, then the correlation coefficient ‘r’ is equal to:

(a) −1/12

(b) 1/12

(c) −1/2√3

(d) 1/2√3

(ii) If 𝑋̅ = 40, 𝑌̅ = 6, 𝜎𝑥 = 10, 𝜎𝑦 = 1.5 𝑎𝑛𝑑 𝑟 = 0.9 for the two sets of data X and Y, then the regression line of X on Y will be :

(a) 𝑥 − 6𝑦 − 4 = 0

(b) 𝑥 + 6𝑦 − 4 = 0

(c) 𝑥 − 6𝑦 + 4 = 0

(d) 𝑥 + 6𝑦 + 4 = 0

#### Question 13:

For 5 observations of pairs (x, y) of variables X and Y, the following results are obtained:

∑ 𝑥 = 15, ∑ 𝑦 = 25, ∑ 𝑥² = 55 , ∑ 𝑦² = 135, ∑ 𝑥𝑦 = 83.

Calculate the value of 𝑏𝑥𝑦 𝑎𝑛𝑑 𝑏yx.

#### Question 14:

A manufacturer wishes to produce two commodities A and B. The number of units of material, labour and equipment needed to produce one unit of each commodity is shown in the table given below. Also shown is the available number of units of each item, material, labour, and equipment.

 Items Commodity A Commodity B Available no. of Units Material 1 2 8 Labour 3 2 12 Equipment 1 1 10

Find the maximum profit if each unit of commodity A earns a profit of ` 2 and each unit of B earns a profit of ` 3.

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