Yogita sold a plasma TV at 20% gain to Shyamla. Shyamla

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Yogita sold a plasma TV at 20% gain to Shyamla. Shyamla sold it to Deepa at 10% profit. If Deepa had to pay $ 33,000 for the plasma TV, find the cost price of the plasma TV for Yogita.

Let C.P. of T.V. for Yogita = $ y
According to question,

y ×		120	×	110	= 33000
		100		100

⇒ y =	33000 × 100 × 100	= $ 25000
	120 × 110

We can find required answer with the help of given formula :
Here, r₁ = 20%, r₂ = 10%
C.P. for Deepa = C.P. for yogita

33000 = C.P. for Yogita

C.P. for Yogita =	33000 × 100 × 100	= $ 25000
	120 × 110