A single discount equivalent to the discount series of 20%, 10% and 15% is?
Choose the correct choice:
A) 31.9  B) 31.7  C) 31.6  D) 38.8  E) 31.1
100*(80/100)*(90/100)*(85/100)= 
<gadget id="calculator">100*(80/100)*(90/100)*(85/100)</gadget>
<output>306/5 = around 61.2</output>
61.2   100 - 61.2= 
<gadget id="calculator">100 - 61.2</gadget>
<output>38.8</output>
38.8   Answer:38.8
<result>D</result>
A single discount equivalent to the discount series of 20%, 10% and 15% is?