Question

Time : 2 Hours)
I Max. Marks : 40
Note : (1) All questions are compulsory.
(2) Use of calculator is not allowed.
Q. 1. (A) Solve any four of the following subquestions:
(1) If x + y = 7 and x = -1, find y.
(2) If A = {a,b), B = {c, d, e, then what is the relation between sets
A and B?
(3) Write the simplest rationalizing factor of 8.
(4) Find the class mark of the class 21-25.
(5) Find the value of x, if 5 : 3 = x: 9.
(6) What is the maximum permissible deduction to various kinds of
savings under section 80C ?
1. (B) Solve any two of the following subquestions :​

Answer 1

Q1) 1)

$x + y = 7 \\ - 1 + y = 7 \\ y = 7 + 1 \\ y = 8$

4) Class mark =

$\frac{25 - 21}{2} = \frac{4}{2} = 2$

5)5:3=x: 9

$\frac{5}{3} = \frac{x}{9} \\ 5 \times 9 = 3x \\ 45 = 3x \\ x = 15$

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Answer 2

Step-by-step explanation:

सेकंड सेमेस्टर एग्जामिनेशन क्लास 9 इन द मार्केट टाइम दोनो सब्जेक्ट मैथमेटिक्स पार्ट आफ अलजेब्रा