Correct Answer: Rs. 16.66
Explanation:
Loss % = ( common gain or loss / 10 )2 %
= (20 / 10)2 %
= 4%
Now assume total CP of both articles be x, then SP = 0.96x = 400
x = 400 / 0.96 = CP
loss = 4% of CP
= (4 / 100) X (400 / 0.96) = Rs. 16.66
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