Question

Ratio of expenditures of companies A and B in 1999 was 3 : 4 respectively. What was the respective ratio of their incomes in 1999?

• A. 21 : 26
• B. 13 : 14
• C. 14 : 13
• D. 26 : 21
• E. None of these

Answer 1

The correct option is E

None of these

$\begin{array}{c}30=\frac{l_1-3x}{3x}\times 100\\ \therefore l_1=3.9x\\ 40=\frac{l_2-4x}{4x}\times 100\\ \therefore l_2=5.6x\\ \frac{l_1}{l_2}=\frac{3.9x}{5.6x}=\frac{39}{56}\end{array}$