Question

what is right option for following questions
1. In a group of 400 people, 250 can speak Hindi and 200 can speak English. How many people

can speak both Hindi and English?

(a) 40 (d) 52 (c) 50 (d) none of these

2. Let f = {(1,1), (2,3), (0, –1), (–1, –3)} be a linear function from Z into Z. Find f(x).

(a) 1 – 2x (b) 2x – 1 (c) x + 1 (d) none of these

3. The value of cos (–1710°) is

(a) 0 (d) 1 (c) 0.5 (d) none of these

4. A wheel makes 360 revolutions in one minute. Through how many radians does it turn in one

second?

(a) 2 (b)  (c) 3 (d) none of these

5. 1 + i

2

+ i4

+ i6

+ ... + i2n is

(a) positive (b) negative (c) 0 (d) cannot be evaluated

6. The complex number (1 – i)4

in the form a + ib is

(a) –4i (d) 1 – 4i (c) –4 (d) none of these

7. The value of

lim sin 4

0 sin 2

x

x  x

is

(a) 2 (b) 1 (c) 3 (d) none of these

8. The intercept cut off by a line from y-axis is twice than that from x-axis, and the line passes

through the point (1, 2). The equation of the line is

(a) 2x + y = 4 (b) 2x + y + 4 = 0 (c) 2x – y = 4 (d) 2x – y + 4 = 0

9. How many 4-digit numbers can be formed by using the digits 1 to 9 if repetition of digits is not

allowed?

(a) 3000 (b) 3024 (c) 1512 (d) none of these​

Answer 1

Answer:

Ans 1= d

Step-by-step explanation:

Because there are over 400 people

Answer 2

Answer:

1st ka answer ha 50

4th ka answer ha 3□