1.

Which of these sets is not a null set?

A. A = {x | 6x = 24 and 3x = 1}
B. B = {x | x + 10= 10}
C. C = {x | x is a man older than 200 years}
D. D = {x | x < x}
Answer» C. C = {x | x is a man older than 200 years}


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