Q567
A person saves 331/3\% of his income. If the saving increases by 22% and the expenditure increases by 10%, then the percentage increase in his income is:
A person saves of his income. If the saving increases by 22% and the expenditure increases by 10%, then the percentage increase in his income is:
A.
14%
AnswerB.
16%
C.
18%
D.
22%
Answer: Option A
Solution
Answer: Option A
Solution:
\begin{array}{*{20}{c}} {}&{{\text{Income}}}& = &{{\text{Expenditure}}}& + &{{\text{Saving}}} \\ {{\text{Old}} \to }&{300}& = &{200}& + &{100} \\ {}&{}&{}&{\,\,\,\,\,\,\,\,\,\,{ \downarrow ^{ + 10\% }}}&{}&{\,\,\,\,\,\,\,\,\,\,{ \downarrow ^{ + 22\% }}} \\ {{\text{New}} \to }&x& = &{220}& + &{122} \end{array}