Some articles were bought at 6 articles for Rs. 5 and sold at 5 articles for Rs. 6. Gain percent is:
30%
33$ \dfrac{1}{3} $%
35%
44%
Explanation:
Suppose, number of articles bought = L.C.M. of 6 and 5 = 30.
C.P. of 30 articles = Rs.$ \left(\dfrac{5}{6} \times 30\right) $= Rs. 25.
S.P. of 30 articles = Rs.$ \left(\dfrac{6}{5} \times 30\right) $= Rs. 36.
$\therefore$ Gain % =$ \left(\dfrac{11}{25} \times 100\right) $% = 44%.