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which of the following collection is...

which of the following collection is a set ?

A

the collection of all girls in your class.

B

the collection of intelligent girls in your class.

C

the collection of beautiful girls in your class

D

the collection of tall girls in your class.

Text Solution

Verified by Experts

The correct Answer is:
A
Clearly collection in (b) ,( c ) and ( d) are not well defined collection , so they do not form a set
A set often decrided in one of the following two ways :
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OBJECTIVE RD SHARMA-SETS-Chapter Test
  1. which of the following collection is a set ?

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  2. Which of the following cannot be the number of elements in the power s...

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  3. If A={1,2,3,4}, then the number of subsets of set A containing element...

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  4. If A={1,2,3,4}, then the number of substets of A than contain the elem...

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  5. If n(u)=100,n(A)=50,n(B)=20 and n(A nnB)=10, then n{(AuuB)^©}

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  6. Let Z denoted the set of integers, then {x inZ:|x-3|lt4}nn{x inZ:|x-...

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  7. If A(n) is the set of fiest n prime numbers, then underset(n=2)overset...

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  8. if n is a set of prime numbers then the value of 10 U n = 2 A n =

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  9. Let A(1),A(2),A(3),…, A(100) be 100 seta and such that n(A(1))=i+1and ...

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  10. If A and B are two sets such that n(A)=7, n(B)=6and (A nnB)ne phi Then...

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  11. If A and B are two sets such that n(A)7, n(B),=6 and n(AnnB) ne phi Th...

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  12. If A(1),A(2),..., A(100) are sets such that n(A(i))=i+2,A(1)subA(2)sub...

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  13. If A,B and C are three non=empty sets such that A and B are disjoint a...

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  14. If A={n:(n^(3)+5n^(2)+2)/(n)"is an integer"},then the number of elemen...

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  15. If {p in N: "p is a prime" and p=(7n^(2)+3n+3)/(n)"for some n" in N}' ...

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  16. A, B and C are three non-empty sets. If A sub B and B subC then which ...

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  17. If A=[1,2,3,4,5,6] then how many subsets of A contain the element 2, 3...

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  18. If S is the set of squares and R is the set of rectangles, then (SuuR)...

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  19. If P is the set of all parallelogram, and T is the set of all trapeziu...

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  20. If n (AnnB)=10, n (BnnC) =20 and n(AnnC)=30, then the greatest possibl...

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  21. If n (annB)=5, n(AnnC)=7 and n(AnnBnnC)=3, then the minimum possible v...

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