Question

A stereo was to be sold at a 70% discount, which amounted to $420 . Which of the following statements, if either, is(are) true?(i) The sale price of the stereo is $180.(ii) The original price of the stereo was $600.
A) A) (i) only
B) B) (ii) only
C) C) Both (i) and (ii)
D) D) Neither (i) nor (ii)

Answer 1

The stereo was 70% off, which means it was sold for 30% of its original price. So let x=original price. Then:
\[.30x=420\]Divide both sides by .3 to get:
\[x=1400\]So the original price was 1400, and the sale price is 420, as told to us in the problem. So both statements are false.

Answer 2

Awesome thank you!