Discrete Structure (DS) MCQs with answers Page - 21

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Q. If set A contains n elements, set B contains m elements then number of elements in AXB is---

  • (A) m+n
  • (B) n-m
  • (C) m.n
  • (D) n/m

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Q. If A,B and C are non empty sets then AX(B∩C) is-----.

  • (A) (AXB)U(AXC)
  • (B) (AXB)∩(AXC)
  • (C) (AXB)∩C
  • (D) (AXC)∩B

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Q. If A,B and C are non empty sets then AX(BUC) is-----.

  • (A) (AXB)U(AXC)
  • (B) (AXB)∩(AXC)
  • (C) (AXB)UC
  • (D) (AXC)UB

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Q. If R is a relation defined from set A to set B then------

  • (A) R=AXB
  • (B) RCAXB
  • (C) RCBXA
  • (D) AXBCR

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Q. If A=(1,2,3} and R on A is defined by R={(1,1),(2,2),(3,3)} then R is…………

  • (A) Reflexive
  • (B) Symmetric
  • (C) Transitive
  • (D) All of these

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Q. If A=(1,2,3} and R on A is defined by R={(1,2),(2,1),(1,1),(2,2)} then R is…………

  • (A) Reflexive and symmetric
  • (B) Reflexive and Transitive
  • (C) Symmetric and Transitive
  • (D) All of the above.

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Q. Which statement is true?

  • (A) Relation can be of the type one many
  • (B) Function can be of the type one many
  • (C) Both (a) and (b)
  • (D) None of these.

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Q. Which statement is true?

  • (A) Every function is a relation.
  • (B) Every Relation is a function.
  • (C) Both A and B.
  • (D) None of these.

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Q. In-----Relation every element is related with itself.

  • (A) Reflexive
  • (B) Symmetric
  • (C) Transitive
  • (D) None

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