–1 vote
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The price of a Maruti car rises by $30$% while the sales of the car came down by $20$%. What is the percent change in the total revenue?

1. $–4$
2. $–2$
3. $+4$
4. $0$
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+1 vote

Let the initial price be 'P' and initial sales be 'S'

So, the initial revenue C = P*S

Now,

Pnew = 1.3P and Snew = 0.8S

$\therefore$ Cnew = Pnew*Snew = 1.3P*0.8S = 1.04C

So, there is a 4% increase in total revenue.

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