If X = {1, 2, 3, 4, 5, 6, 7, 8, 9} A = {x ? N: 30 < x2 < 70}, B = {x : x is a prime numberless than 10}, then which of the following is false:

If X = {1, 2, 3, 4, 5, 6, 7, 8, 9} A = {x ? N: 30 < x2 < 70}, B = {x :

1.	If X = {1, 2, 3, 4, 5, 6, 7, 8, 9} A = {x ? N: 30 < x2 < 70}, B = {x : x is a prime numberless than 10}, then which of the following is false:
A.	A? B = {7, 8}
B.	A U B = {2, 3, 5, 6, 7, 8}
C.	A ? B = {2, 3, 5, 6, 8}
D.	A-B = {6, 8}
Answer» B. A U B = {2, 3, 5, 6, 7, 8}

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If X = {1, 2, 3, 4, 5, 6, 7, 8, 9} A = {x ? N: 30 < x2 < 70}, B = {x : x is a prime numberless than 10}, then which of the following is false:

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