Question: if 75 percent of a class answered the first question on a certain test correctly , 35 percent answered the second question on the test correctly , and 20 percent answered neither of the questions correctly , what percent answered both correctly ?
A) 10 %
B) ( 8 ) 20 %
C) 30 %
D) 50 %
E) 65 %
Correct answer: C
Grade: 7 | Topic: Ratios and proportions | Difficulty: Medium | Standard: 7.RP.A.3