A shopkeeper sells 24 articles for 2400 and earns a profit of 10%. Find the selling price of one article. 

The cost price of 24 articles=2400

The cost price of 1 article=$\frac{2400}{24}=100$

Profit percentage=10%

$Profit \%=\frac{Profit}{Cost price}\times 100$

$Profit=\frac{Profit \%\times Cost price}{100}$

$Profit=\frac{10\times 100}{100}$

$Profit =10$

$Selling \cos t=Profit+Cost price$

$Selling \cos t=10+100$

$Selling \cos t=110$