A single discount equivalent to the discount series of 30%, 20% and 10% is?
Choices:
A) 31.8 B) 31.1 C) 31.6 D) 31.2 E) 49.6
49.6xplanation:     100*(70/100)*(80/100)*(90/100)= 
<gadget id="calculator">  100*(70/100)*(80/100)*(90/100)</gadget>
<output>252/5 = around 50.4</output>
50.4   100 - 50.4= 
<gadget id="calculator">100 - 50.4</gadget>
<output>49.6</output>
49.6   Answer: 49.6
<result>E</result>
A single discount equivalent to the discount series of 30%, 20% and 10% is?