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Ratio and Proportion — Mathematics STD 10 — Question

ICSE BoardEnglish MediumSTD 10MathematicsRatio and Proportion2 Marks
Question
Find the compounded ratio of: 4 : 5, 5 : 7 and 9 : 11
✓

Answer

$4: 5,5: 7$ and $9: 11$Compound ratio
$
\begin{aligned}
& =\frac{4}{5} \times \frac{5}{7} \times \frac{9}{11} \\
& =\frac{36}{77}
\end{aligned}
$
or
36: 77.

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