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A and B are two sets, then A-B = phi, if...

A and B are two sets, then `A-B = phi`, if and only if

A

`A sub B`

B

`B sub A`

C

A=B

D

`A nn B = phi`

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The correct Answer is:
A
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HIMALAYA PUBLICATION-SETS,RELATIONS AND FUNCTIONS-QUESTION BANK
  1. If A and B are any two sets then (AuuB) - (A nn B) =

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  2. If A and B are any two sets then A nn (A uu B)' =

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  3. A and B are two sets, then A-B = phi, if and only if

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  4. If A,B and C are non -empty sets , then (A-B) uu (B-A) equals :

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  5. If the sets A has p elements, B has q elements, then number of element...

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  6. If A = {x:x in N, (x^2-9)(x^2-5)=0} and B={x:x in N,x(x-2)(x-3)=0} whe...

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  7. If A {2, 4} and B= {3, 4, 5} then (AnnB) xx (AuuB) =

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  8. Let A ={1, 2}, B = {3, 4} and C = {4, 5}. Then (A-B) xx (B-C) is

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  9. If A = {1, 2, 3}, B= {3,8}, then (AuuB)xx(AnnB) is

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  10. If A = {1, 2, 3, 4} then the number of elements in A xx A is

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  11. Let A = {1, 2, 3, 4}, B= {2, 3, 4, 5}, then n[(A xx B)nn(B xx A)] is

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  12. If A = {2, 4} and B= {3, 4, 5}, then (A nn B) xx (B uu A)]

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  13. If A = {x:x^2-5x+6=0}, B = {2, 4}, C = {4, 5}, then Axx(B nn C) =

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  14. If aN = {an : n in N} and bn nn cN = dN where a, b, c, d in N and b...

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  15. Let N underseta = (an : n in N), then N underset6 in N underset8 is ...

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  16. Sets A and B have 3 and 6 elements respectively. What can be the minim...

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  17. If A and B are two finite sets such that A nn B != phi, then n (A uu...

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  18. If A and B are finite sets and A sub B then

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  19. If A and B are any two finite sets then n (A) + n (B) is equal to

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  20. In a group of 75 persons every one takes either tea or coffee. If ...

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