Question

A={11,13,21,31,49,55}
B={13,31,48,55}
C={11,13,21,48}

A∩B={?}
A∩C={?}
C∩B={?}
A∩(BUC)={?}
AU(B∩C)={?}

Answer 1

a) AUB = {11,13,21,31,49,55,48,55}

b) A∩B ={13,31} 

c) AUC ={11,13,21,31,49,55,48} 

d) A∩C={11,13,21} 

e) CUB={13,31,48,55,11,21} 

f) C∩B ={13,48} 

g) AU(BUC) = AUBUC ={11,13,21,31,48,49,55} 

h)A U (B∩C) ={13,48,11,21,31,49,55} 

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