A single discount equivalent to the discount series of 30%, 10% and 8% is? Choose the correct choice:
A) 31.8
B) 42.04
C) 31.6
D) 31.2
E) 31.9
Explanation:   100*(70/100)*(90/100)*(92/100)= 
<gadget id="calculator">100*(70/100)*(90/100)*(92/100)</gadget>
<output>1_449/25 = around 57.96</output>
57.96   100 - 57.96= 
<gadget id="calculator">100 - 57.96</gadget>
<output>42.04</output>
42.04   Answer: 42.04
<result>B</result>
A single discount equivalent to the discount series of 30%, 10% and 8% is?