1.

Q:  $${a\over b}={2\over3}$$ and $${b\over c}={4\over5}$$ then the ratio  $${a+b}\over {b+c}$$ equal to:

A. $${20\over27} $$
B. $${27\over20} $$
C. $${6\over8} $$
D. $${8\over6} $$
Answer» B. $${27\over20} $$


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