A pair of articles was bought for $50 at a discount of 20%. What must be the marked price of each of the article? Pick one:
A) $25
B) $31.25
C) $29.65
D) $35.95
E) $45.62
S.P. of each of the article = 50/2= 
<gadget id="calculator">50/2</gadget>
<output>25</output>
$25   Let M.P= $x   80% of x = 25   x = 25*100/80= 
<gadget id="calculator">25*100/80</gadget>
<output>125/4 = around 31.25</output>
$31.25   Answer is $31.25
<result>B</result>
A pair of articles was bought for $50 at a discount of 20%. What must be the marked price of each of the article?