Question:যদি A = {2, 3, 4, 8, 10}, B = {3, 4, 5, 10, 12}

 C = {4, 5, 6, 12, 14} হয় তাহলে `(AuuB)nn(AuuC)` = কত? 

A {3} 
B {1, 2, 3, 4} 
C {1, 2, 5, 6} 
D {1, 2, 3, 4, 5, 6} 

+ Answer
B 

+ Explanation
`BnnC = {3, 4}nn {4, 5, 6} = {4}`

      `Auu(BnnC) = {1, 2, 3} uu {4} = {1, 2, 3, 4}`

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Irin Moni

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