Question

When the price of TV set was increased by 30% the no. of TV sets sold decreased by 20%. What was the effect on the sales ?

• A. 8% decreased
• B. 8% increased
• C. 4% decreased
• D. 4% increased

Answer 1

The correct option is D 4% increased

Effect on sale $=30+(-20)+\frac{30\times (-20)}{100}$
$=30-20-\frac{600}{100}=4$

Hence the sales increased by 4%.