You would have a 60%.
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To determine your grade based on 20 questions with 4 wrong answers, you first need to calculate the total number of questions answered correctly. Subtract the number of wrong answers (4) from the total questions (20) to get the correct answers (20 - 4 = 16). Then, divide the number of correct answers (16) by the total questions (20) and multiply by 100 to get the percentage. So, your grade would be 80%.
You get a 90 as a score when you miss 2 out of 20 questions because each question is worth 5 points.
That is an A. You got 19 out of 20.
20
15 out of 20 would be grade of 75 percent.