. { x : –1 ≤ x<5, x ϵ R} as interval is *
[–1,5)
(–1,5)
(–1,5]
[1,5]
This is a required question
11. If A = {2,3,4}, B = { 3,6,7} then A∪B= *
{2,3,4,5,6,7}
{2,3,4,6,7}
{3}
None of these
12. If A⊂B, then which of the following is true *
A=B
A∩B=A
A∩B=ɸ
None of these
13. If A={1,2,3} then the number of elements in P(A) *
3
9
8
given information is insufficient
14. If aN={x| x ϵ N and x is multiple of a}, then 3N∩5N *
15N
5N
8N
3N
15. In a group of 800 people, 500 can speak Hindi and 320 can speak English. Find how many can speak both Hindi and English? *
20
180
320
None of these
16. A and B are sets having 5 and 11 elements respectively then the minimum number of elements in AUB *
5
11
16
None of these
17. Write the Roster form of the set {x: xϵZ, |x|<4} *
{–3,–2,–1,1,2,3}
ɸ
{–3,–2,–1,0,1,2,3}
{0,1,2,3,4}
18. (AUB)'= *
A
A'UB'
A'∩B'
B
19. If A and B are two sets such that A ∪ B= A ∩ B, then *
A⊂B
B⊂A
A=B
None of these
20. In a class of 60 students, 30 play cricket, 35 play football and 10 play both the games. How many students play neither of the two? *
15
50
55
5
21. Which of the following is incorrect if A is non empty set ? *
AUɸ=A
A∩ɸ=A
A∩A=A
A∩ɸ=ɸ
22. Which of the following represent "A but not B"? *
AUB
A∩B
A–B
None of these
23. Which of the following is correct? *
AU(B∩C)=(AUB)∩(AUC)
(AUB)UA=A
AU(BUC)=(A∩B)U(A∩C)
(AUB)∩B=A
24. In a class of 120 students roll numbered 1 to 120, all even roll numbered students opt for English, whose roll numbers are divisible by 5 opt for French and those whose roll numbers are divisible by 7 opt for Spanish. How many opt for none of the three languages? *
41
69
56
79
25. In a class of 50 students, 10 did not opt for math, 15 did not opt for science and 2 did not opt for either. How many students of the class opted for both math and science? *
26
24
25
27
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I don't no bro do it yourself
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