Sanket earns twice as much in the month of March as in each of the other months of the year. What part of his entire annual earnings was earned in March?
(a)$\frac{1}{7}$
(b)$\frac{1}{6}$
(c)$\frac{2}{11}$
(d)$\frac{2}{13}$
Answer
Answer (as printed): D
Explanation
Suppose Sanket earns ₹ $x$ in each of the other eleven months. Then, Sanket's earning in March $=₹(2 x)$. Sanket's annual earning $=₹(11 x+2 x)=₹(13 x)$. $$\therefore \quad \text { Required fraction }=\frac{2 x}{13 x}=\frac{2}{13} .$$
Explanation as extracted from the printed page; notation may be imperfect.