Question

A lamp originally costs $30. Krishna has a 5% off coupon for the lamp. After the coupon, a 5% sales tax is applied. Will she pay more than $30, less than $30, or exactly $30? More than $30 Less than $30 Exactly $30

Answer 1

A lamp originally costs $30.

Applying the discount,

`30\cdot(5)/(100)=1.5`

she will pay $30 - $1.5 = $28.5

Adding taxes,

`28.5\cdot(5)/(100)=1.43`

she has to pay $28.5 + $1.43 = $29.93. She will pay less than $30