If 75 % of a boys answered the first question on a certain test correctly, 55 % answered the second question on the test correctly, and 20 % answered neither of the questions correctly, what % answered both correctly?	Choose the correct option
A) 10%	B) (8) 20%	C) 50%	D) 60%	E) 65%
{Total} = {First} + {Second} - {Both} + {Neither}   100% = 75% + 55% - {Both} + 20% --&gt; {Both} = 50%.   Answer: 50%
<result>C</result>
If 75 % of a boys answered the first question on a certain test correctly, 55 % answered the second question on the test correctly, and 20 % answered neither of the questions correctly, what % answered both correctly?