A single discount equivalent to the discount series of 30%, 10% and 5% is?  Options
A) 40.15
B) 31.7
C) 31.6
D) 31.5
E) 31.1
100*(70/100)*(90/100)*(95/100)= 
<gadget id="calculator">100*(70/100)*(90/100)*(95/100)</gadget>
<output>1_197/20 = around 59.85</output>
59.85   100 - 59.85= 
<gadget id="calculator">100 - 59.85</gadget>
<output>40.15</output>
40.15   40.15nswer:40.15
<result>A</result>
A single discount equivalent to the discount series of 30%, 10% and 5% is?