A single discount equivalent to the discount series of 20%, 10% and 5% is?	Choose the correct choice: A) 31.9 B) 31.7 C) 31.6 D) 31.5 E) 31.1
100*(80/100)*(90/100)*(95/100)= 
<gadget id="calculator">100*(80/100)*(90/100)*(95/100)</gadget>
<output>342/5 = around 68.4</output>
68.4   100 - 68.4= 
<gadget id="calculator">100 - 68.4</gadget>
<output>31.6</output>
31.6   Answer:31.6
<result>C</result>
A single discount equivalent to the discount series of 20%, 10% and 5% is?