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A and B are not singleton sets. n(A xx B...

A and B are not singleton sets. `n(A xx B)= 21`. If `A sub B" then "n(B)="………."`.

A

3

B

7

C

21

D

1

Text Solution

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The correct Answer is:
B
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KUMAR PRAKASHAN-SETS-TEXTBOOK BASED MCQs
  1. A and B are not singleton sets. n(A xx B)= 21. If A sub B" then "n(B)=...

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  2. A= {x : x in Z, x" is a solution of " x^(4)- 16= 0} then A= "……….".

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  3. If B={phi} then,

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  4. For real number R out of the following, which is not correct?

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  5. A= {1, 2, 3, 4}, B= {-1, 1, 0, -2, 2}, C= {1, 3, 4} are subset of whic...

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  6. The number of elements in the power set of {x : x in N, x^(2) lt 9} is...

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  7. If A sub B then A cap B = ..........

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  8. U= [-2,1], A= {x : x in N, x^(2)+x -2=0} then A'="……….".

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  9. Taking the set of natural number as universal set and A= {x : x -8 =3}...

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  10. If n(U)= 700, n(A)= 200, n(B)= 300, n(A cap B)= 100" then "n(A' cap...

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  11. If N(a)= {an : n in N}, then N(5) cap N(7)="………."

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  12. If aN= {ax : x in N}" then "3N cap 7N="………."

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  13. For set {(a, b) : 2a^(2)+3b^(2)= 35, a, b in Z} the number of its elem...

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  14. A and B are two sets (A - B) cup (B - A) cup (A cap B)="……….."

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  15. U= {x : x in N, x le 10}, A= {1, 3, 5, 7, 9}, B= {2, 4, 6, 8, 10} then...

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  16. A= {x : x in N, x^(2)+4=0} then,

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  17. For interval (-1, 1) which of the following statements is true?

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  18. If A= {1, 3, 5, {2, 4}}" and "B= {2, 4} then,

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  19. Fill in the blanks to make each of the following a true statement : ...

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  20. Which of the following statements is false ?

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