A piece of work was finished by A, B and C together. A and B together finished 60% of the work and B and C together finished 70% of the work. WhoÂ among the three is most efficient?

A piece of work was finished by A, B and C together. A and B together

1.	A piece of work was finished by A, B and C together. A and B together finished 60% of the work and B and C together finished 70% of the work. WhoÂ among the three is most efficient?
A.	A
B.	B
C.	C
D.	None
Answer» D. None

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A piece of work was finished by A, B and C together. A and B together finished 60% of the work and B and C together finished 70% of the work. WhoÂ among the three is most efficient?

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