A) 20 : 38
B) 50 : 147
C) 10 : 21
D) 50 : 151
Correct Answer: B
Solution :
\[\frac{a}{b}=\frac{5}{7},\frac{c}{d}=\frac{2a}{3b}\] \[\Rightarrow \] \[\frac{a}{b}\times \frac{c}{d}=\frac{5}{7}\times \frac{2a}{3b}\] \[\Rightarrow \] \[\frac{ac}{bd}=\frac{10}{21}\times \frac{5}{7}=\frac{50}{147}\]You need to login to perform this action.
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