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Subjects
Class 12MathematicsRelations and FunctionsIntroduction to RelationsEasy
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If (A) has (2) elements and (B) has (3) elements, how many total relations are there from (A) to (B)?

Answer and explanation

Correct answer: (2^6)

Step 1: (A\times B) has (2\times3=6) ordered pairs. Step 2: A relation is a subset of (A\times B), so total relations are (2^6). Step 3: For two different sets, first count (mn) pairs.

Related tags

RelationsRelation-From-A-To-BCountingIntroduction To RelationsRelations And FunctionsMathematicsClass 12 Mcq
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10 more MCQs
  1. 1If (A={1,2}), what does a relation on (A) mean?
  2. 2If (A={a,b}) and (B={1,2}), how many ordered pairs are there in (A\times B)?
  3. 3If (A={1,2}), how many total relations can be formed on (A)?
  4. 4Which relation is the universal relation on (A={1,2,3})?
  5. 5Which statement is correct about the empty relation?
  6. 6If (A={1,2,3}), how many pairs are there in the universal relation on (A)?
  7. 7Which pairs are compulsory in the identity relation on a set (A)?
  8. 8If (A={1,2,3}), which is the identity relation?
  9. 9What condition is necessary for a relation (R) to be reflexive?
  10. 10On (A={1,2}), which property is definitely satisfied by (R={(1,1),(2,2),(1,2)})?
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