If 75 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?
10%
20%
30%
50%
65%
Description (বিবরণ) :
প্রশ্ন: If 75 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?
ব্যাখ্যা: Percentage = (75 + 55 + 20) - 100 = 50
