If 85 percent of the test takers taking an old paper and pencil GMAT exam answered the first question on a given math section correctly, and 65 percent of the test takers answered the second question correctly, and 5 percent of the test takers answered neither question correctly, what percent answered both correctly? Pick one:
A) 60 %
B) 55 %
C) 70%
D) 75%
E) 80%
{Total} = {First correctly} + {Second correctly} - {Both correctly} + {Neither correctly}   100 = 85 + 65 - {Both correctly} + 5   {Both correctly} = 55.   Answer: 55 %.
<result>B</result>
If 85 percent of the test takers taking an old paper and pencil GMAT exam answered the first question on a given math section correctly, and 65 percent of the test takers answered the second question correctly, and 5 percent of the test takers answered neither question correctly, what percent answered both correctly?