If the middle point of the line segment joining the points (5, a) and

1.	If the middle point of the line segment joining the points (5, a) and (b,7) be (3,5), then (a, b) =
A.	(3, 1)
B.	(1, 3)
C.	(-2,-2)
D.	(-3, -1)
Answer» B. (1, 3)

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If the middle point of the line segment joining the points (5, a) and (b,7) be (3,5), then (a, b) =

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