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?

Question

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?

Accepted Answer

সঠিক উত্তর: 50%। ব্যাখ্যা: