If 75% students of a class answered the 1st question on a certain test correctly, 55% answered the 2nd question on the test correctly and 20% answered neither of the questions correctly, what percent answered both correctly?
অপশনসমূহ (Options)
সঠিক উত্তর চিহ্নিত
ক
10%
খ
20%
গ
30%
ঘ
50%