Question

20.
The price of a product decreased by 20% and the quantity sold increased by 20%. What is the
percentage increase/decrease in the total revenue of the product?
1) No change
2) 2% increase
3) 4% increase
4) 4% decrease
5) 2% decrease​

Answer 1

Answer:

2nd option

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Answer 2

Answer:

4) 4% decrease

Step-by-step explanation:

Lets say C.P for 10 pens is Rs.100

Revenue (S.P) = 100×10 = 1000

Price is decreased by 20% = Rs 80

Quantity sold increased by 20% = Rs 12

∴ CP for 12 pens is Rs 80

new Revenue (S.P)  = 80×12 = Rs.960

Diff = 1000-960 = Rs.40

$\frac{40}{1000}$×100 = 4% decrease