#### 11th Standard Maths Sets, Relations and Functions English Medium Free Online Test One Mark Questions 2020 - 2021

11th Standard

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Maths

Time : 00:10:00 Hrs
Total Marks : 10

10 x 1 = 10
1. The number of constant functions from a set containing m elements to a set containing n elements is

(a)

mn

(b)

m

(c)

n

(d)

m+n

2. If the function f:[-3,3]➝S defined by f(x)=x2 is onto, then S is

(a)

[-9,9]

(b)

R

(c)

[-3,3]

(d)

[0,9]

3. Which one of the following is a finite set?

(a)

{x:x∈Z, x<5}

(b)

{x:x∈W, x≥5}

(c)

{x:x∈N, x>10}

(d)

{x:x is an even prime number}

4. Given A={5,6,7,8}. Which one of the following is incorrect?

(a)

Ø⊆A

(b)

A⊆A

(c)

{7,8,9}⊆A

(d)

{5}⊆A

5. If A={1,2,3}, B={1,4,6,9} and R is a relation from A to B defined by "x is greater than y". The range of R is

(a)

{1,4,6,9}

(b)

{4,6,9}

(c)

{1}

(d)

None of these

6. Let R be the relation over the set of all straight lines in a plane such that l1Rl2 ⇔ l1丄l2 . Then  R is

(a)

symmetric

(b)

reflexive

(c)

transitive

(d)

an equivalent relation

7. If A = {(x,y) : y = ex, x∈R} and B = {(x,y) : y=e-x, x ∈ R} then n(A∩B) is

(a)

Infinity

(b)

0

(c)

1

(d)

2

8. The number of students who take both the subjects Mathematics and Chemistry is 70. This represents 10% of the enrollment in Mathematics and 14% of the enrollment in Chemistry. The number of students take at least one of these two subjects, is

(a)

1120

(b)

1130

(c)

1100

(d)

insufficient data

9. Let R be the universal relation on a set X with more than one element. Then R is

(a)

not reflexive

(b)

not symmetric

(c)

transitive

(d)

none of the above

10. Which of the following functions is an even function?

(a)

$f(x)={2^x+2^{-n}\over 2^x-2^{-x}}$

(b)

$f(x)={3^x+1\over 3^x-1}$

(c)

$f(x)={x.3^x-1\over 3^x+1}$

(d)

$f(x) = log (x +\sqrt{x^2 + 1})$