On the set of lines ,begin perpendicular is a ___relation.
Correct
A set of lines ,begin perpendicular is a symmentric relation
Incorrect
A set of lines ,begin perpendicular is a symmentric relation
Question 2 of 25
2. Question
1 points
Correct
Incorrect
Question 3 of 25
3. Question
1 points
For a group of 200 persons ,100 are interested in music,70 in photography and 40 in swimming.Further more 40 are interested in both music and photography,30 in both music and swimming ,20 in photography and swimming and 10 in all the three.how many are interested in photography but not in music and swimming?
Correct
let photography =P
music=M
swimming=S
n(PUMUS=200,n(M)=100,n(P)=70,n(S)=40
n(M∩P)=40,n(M∩S)=30,n(P∩S)=20
n(P∩M∩S)=10
n(P∩M’∩S’)=n(P)-n(P∩M)-n(P∩S)+n(P∩M∩S)
=70-40-20+10=80-60=20
Incorrect
let photography =P
music=M
swimming=S
n(PUMUS=200,n(M)=100,n(P)=70,n(S)=40
n(M∩P)=40,n(M∩S)=30,n(P∩S)=20
n(P∩M∩S)=10
n(P∩M’∩S’)=n(P)-n(P∩M)-n(P∩S)+n(P∩M∩S)
=70-40-20+10=80-60=20
Question 4 of 25
4. Question
1 points
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Incorrect
Question 5 of 25
5. Question
1 points
The number of elements in range of constant function is
Correct
The number of elements in range of constant function is infinite
Incorrect
The number of elements in range of constant function is infinite
Question 6 of 25
6. Question
1 points
let A={1,2,3} then the relation R={(1,1),(2,3),(2,2),(3,3),(1,2)} is
Of the 200 candidates who were interviewed for a position at call center ,100 had 2 wheeler,70 had a credit card and 140 had a mobile phone,40 of them had both a two wheeler and a credit card , 30 had both a credit card and a mobile phone , 60 had both two wheeler and a mobile phone and 10 had all the three.how many candidates had none of the three?
Correct
Incorrect
Question 9 of 25
9. Question
1 points
Correct
Incorrect
Question 10 of 25
10. Question
1 points
let A={1,2,3} and B={6,4,7} then , the relation R={(2,4)(3,6)} will be
Correct
A={1,2,3} and B={6,4,7}
relation R={(2,4)(3,6)} will be function from A to B.
Incorrect
A={1,2,3} and B={6,4,7}
relation R={(2,4)(3,6)} will be function from A to B.
Question 11 of 25
11. Question
1 points
In a class of 50 students,35 opted for maths and 37 for opted for commerce.The number of such students who opted for both maths and commerce are
Correct
given, n(muc)=50
n(m)=35
n(c)=37
n(muc)=n(m)+n(c)-n(m∩c)
50=35+37-n(m∩c)
n(m∩c)=22
Incorrect
given, n(muc)=50
n(m)=35
n(c)=37
n(muc)=n(m)+n(c)-n(m∩c)
50=35+37-n(m∩c)
n(m∩c)=22
Question 12 of 25
12. Question
1 points
The range of {(1,0),(2,0),(3,0),(4,0),(0,0)} is
Correct
range = {(1,0),(2,0),(3,0),(4,0),(0,0)}={0}
Incorrect
range = {(1,0),(2,0),(3,0),(4,0),(0,0)}={0}
Question 13 of 25
13. Question
1 points
Correct
Incorrect
Question 14 of 25
14. Question
1 points
If A={2,3} , B={4,5},C={5,6},then Ax(B∩C)=_____
Correct
A={2,3} , B={4,5},C={5,6}
B∩C=5
Ax(B∩C)={2,3}x{5}={(2,5),(3,5)}
Incorrect
A={2,3} , B={4,5},C={5,6}
B∩C=5
Ax(B∩C)={2,3}x{5}={(2,5),(3,5)}
Question 15 of 25
15. Question
1 points
If S={1,2,3} then the relation {(1,1),(2,2),(1,2),(2,1)} is symmetric and
Correct
If S={1,2,3} then the relation {(1,1),(2,2),(1,2),(2,1)} is symmetric and transitive but not reflexive
Incorrect
If S={1,2,3} then the relation {(1,1),(2,2),(1,2),(2,1)} is symmetric and transitive but not reflexive
Question 16 of 25
16. Question
1 points
Correct
Incorrect
Question 17 of 25
17. Question
1 points
Correct
Incorrect
Question 18 of 25
18. Question
1 points
If A={x,y,z},B={a,b,c,d},then which of the following relation from the set A to set B is a function?
In a class of 80 students,35% students can play only cricket ,45% students can play only table tennis and the remaining students can play both the games.In all how many students can play cricket?
Correct
Incorrect
Question 20 of 25
20. Question
1 points
If f(x)=2x+2 and g(x)=x.x,then the value of fog(4) is:
Correct
Incorrect
Question 21 of 25
21. Question
1 points
The number of subsets of the set formed by the word Allahabad is
Correct
A=set of the letter of the word ALLAHABAD={A,L,H,B,D}
n(A)=5
no.of sub set =
Incorrect
A=set of the letter of the word ALLAHABAD={A,L,H,B,D}
n(A)=5
no.of sub set =
Question 22 of 25
22. Question
1 points
In a group of students 80 can speak hindi,60 can speak english and 40 can speak english and hindi both then number of students is