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?
A. 10%
B. 20%
C. 30%
D. 50%
E. 65%
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সঠিক উত্তরঃ
D.
50%
Explanation:
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