Q305
The ratio of the monthly incomes of X and Y is 5 : 4 and that of their monthly expenditures is 9 : 7. If the income of Y is equal to the expenditure of X, then what is the ratio of the saving of X and Y?
A.
9 : 8
AnswerB.
6 : 7
C.
8 : 9
D.
7 : 6
Answer: Option A
Solution
Answer: Option A
Solution:
\begin{array}{*{20}{c}}
{}&{{\text{X}}\,\,\,\,\,:\,\,\,\,\,{\text{Y}}} \\
{{\text{Income}} \to }&{{5_{ \times 9}}\,\,\,:\,\,\,{4_{ \times 9}}} \\
{{\text{Expenditure}} \to }&{{9_{ \times 4}}\,\,\,:\,\,\,{7_{ \times 4}}} \\
{{\text{Saving}} \to }&{\overline {\underline {\,\,9\,\,\,\,\,\,:\,\,\,\,\,\,8\,\,} } }
\end{array}Y's income = X's Expenditure
Saving = 9 : 8