A sells radio to B at a loss of 20%, B sells it to C at a loss of 30% and C sells it to D at a loss of 10%. If A pays ₹ 2000, then the Cost Price for D is :
₹ 1008
We can solve this problem using the method of Successive values instead of calculating one by one.
CP for D = 2000 ×(1−20100)×(1−30100)×(1−10100)
= 2000 ×80100×70100×90100
= ₹ 1008