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1. |
If a : b = 20:5 then find out the value of (13a-9b): (11a-7b)? |
A. | $$ {43 over 37}$$ |
B. | $$ {43 over 42}$$ |
C. | $$ {44 over 37}$$ |
D. | $$ {40 over 33}$$ |
Answer» B. $$ {43 over 42}$$ | |