答案:A
解析:
From a/b = 3 is implied that (a+b)/b = 4 (1)
And from b/c = 7 is implied that b/(b+c) = 7/8 (2)
If we multiply (1) and (2) together, we have that (a+b)/(b+c) = 4*(7/8) = 7/2 (b is canceled out).
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答案:A
解析:
From a/b = 3 is implied that (a+b)/b = 4 (1)
And from b/c = 7 is implied that b/(b+c) = 7/8 (2)
If we multiply (1) and (2) together, we have that (a+b)/(b+c) = 4*(7/8) = 7/2 (b is canceled out).