A pair of articles was bought for Rs. 37.40 at a discount of 15%. What must be the marked price of each of the articles ?  Choose the correct answer:
A) Rs15
B) Rs 20
C) Rs 22
D) Rs 25
E) None of these
Explanation:   As question states that rate was of pair of articles,   So rate of One article = 37.40/2 = Rs. 18.70   Let Marked price = Rs X   then 85% of X = 18.70   =&gt; X = 1870/85= 
<gadget id="calculator">1870/85</gadget>
<output>22</output>
22   Option Rs 22
<result>C</result>
A pair of articles was bought for Rs. 37.40 at a discount of 15%. What must be the marked price of each of the articles ?