made easy test series

Question

Consider a relation $R(ABCDEFGH)$.

How many superkeys will be there in relation $R$ if the candidate keys for relation are ${A, BC, CDE, EF}$?

Comments

Is the answer 276?

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answer is $188$ . Use inclusion-exclusion principle

Answer 1

ANSWER IS 188

 

 

 

Comments

how

Answer 2

Answer 3

4

Answer 4

183