Question

A shopkeeper bought 11 hairclips for rs. 10 ans sold 10 hairclips for rs. 11. Find profit or loss%

Answer 1

10% profit take shopkeeper

Answer 2

$cost \: of \: 11 \: hairclips = rs.10 \\ cost \: of \: 1 \: hairclip = rs.10 \div 11 \\ selling \: price \: of \: 10 \: hairclips = rs.11 \\ selling \: price \: of \: 1 \: hairclip = rs11 \div 10 \\ profit = \frac{11}{10} - \frac{10}{11} = \frac{121 - 100}{110} = \frac{21}{110} \\ profit\% = \frac{21}{110} \times \frac{11}{10} = \frac{21}{100}\%$