#### Set Language One Mark Questions

9th Standard

Reg.No. :
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Maths

Time : 00:30:00 Hrs
Total Marks : 10
10 x 1 = 10
1. If U={x:x$\in$N and x<10}, A={1, 2, 3, 5, 8} and B={2, 5, 6, 7, 9}, then $n\{ (A\cup B)'\}$ is

(a)

1

(b)

2

(c)

4

(d)

8

2. For any three sets P, Q and R, P-(Q$\\ \cap$R) is

(a)

P-(Q$\cup$R)

(b)

(P$\\ \cap$Q)-R

(c)

(P-Q)$\cup$(P-R)

(d)

(P-Q)$\\ \cap$(P-R)

3. For any three sets A, B and C, (A−B)∩(B −C) is equal to

(a)

A only

(b)

B only

(c)

C only

(d)

ф

4. If J = Set of three sided shapes, K = Set of shapes with two equal sides and L = Set of shapes with right angle, then J ∩ K ⋂ L is

(a)

Set of isoceles triangles

(b)

Set of equilateral triangles

(c)

Set of isoceles right triangles

(d)

Set of right angled triangles

5. If A and B are two non-empty sets, then (A-B)U(A⋂B) is

(a)

A

(b)

B

(c)

ф

(d)

U

6. The shaded region in the venn diagram is

(a)

$A\cup B$

(b)

$A\cap B$

(c)

$\left( A\cap B \right) ^{ ' }$

(d)

$\left( A-B \right) \cup \left( B-A \right)$

7. If A,B,C are non-overlapping sets,then n $\left( A\cap B\cap C \right)$ is ___________

(a)

n(A) + n(B) + n(C)

(b)

$n\left( A\cup B\cup C \right)$

(c)

0

(d)

$n\left( A\cap B \right)$

8. If U={x:x$\in$W and x<20},A={2,4,,6,8},B={6,8,12,14} then $\left[ n\left( A\cup B^{ ' } \right) \right]$

(a)

15%

(b)

20%

(c)

10%

(d)

5%

9. In a town 30% like only coffee,20% like only tea,10% like only like,15% like only any two of them,5% only like all the three. What is the percentage of people who like none them.

(a)

15%

(b)

20%

(c)

10%

(d)

5%

10. $\left[ n\left( A\cup B\cup C \right) ^{ ' } \right]$=_______

(a)

$n\left( A\cap B\cap C \right)$

(b)

$n\left( U \right) -n\left( A\cup B\cup C \right)$

(c)

n(U)

(d)

$\Phi$