If 65 percent of a class answered the first question on a certain test correctly, 55 percent answered the second question on the test correctly, and 20 percent answered neither of the questions correctly, what percent answered both correctly? Choose one:	A) 45%	B) 40%	C) 35%	D) 30%	E) 25%
65% answered the first question correctly and 20% answered neither correctly.   Then 15% missed the first question but answered the second question correctly.   Then the percent who answered both correctly is 55% - 15% = 40%.   The answer is 40%.55  - 15= 
<gadget id="calculator">55  - 15</gadget>
<output>40</output>
40%.   The answer is 40%.
<result>B</result>
If 65 percent of a class answered the first question on a certain test correctly, 55 percent answered the second question on the test correctly, and 20 percent answered neither of the questions correctly, what percent answered both correctly?