A trader marks his goods 20% above cost price but allows

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A trader marks his goods 20% above cost price but allows his customers a discount of 10%, the cost price of a blackboard, which is sold for Rs. 216, is

1. Rs. 196
2. Rs. 180
3. Rs. 200
4. Rs. 108

Correct Option: C

Let C.P. of article = Rs. 100
∴ Marked price = Rs. 120

∴ S.P. of article =	120 × 90	= Rs. 108
	100

∵ If S.P. = Rs. 108,
C.P. = Rs. 100
∴ If S.P. = Rs. 216,

C.P. =	100	× 216 = Rs. 200
	108