If a student answered 90% of the questions correctly in an exam and there were 200 questions in total, how many questions did the student answer incorrectly?
Practice Questions
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Q1
If a student answered 90% of the questions correctly in an exam and there were 200 questions in total, how many questions did the student answer incorrectly?
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The number of questions answered correctly is 90% of 200, which is 180. Therefore, the number of questions answered incorrectly is 200 - 180 = 20.
Questions & Step-by-step Solutions
1 item
Q
Q: If a student answered 90% of the questions correctly in an exam and there were 200 questions in total, how many questions did the student answer incorrectly?
Solution: The number of questions answered correctly is 90% of 200, which is 180. Therefore, the number of questions answered incorrectly is 200 - 180 = 20.
Steps: 8
Step 1: Understand that the student answered 90% of the questions correctly.
Step 2: Know that there are a total of 200 questions in the exam.
Step 3: Calculate how many questions were answered correctly by finding 90% of 200.
Step 4: To find 90% of 200, multiply 200 by 0.90 (which is the decimal form of 90%).
Step 5: 200 multiplied by 0.90 equals 180. So, the student answered 180 questions correctly.
Step 6: To find out how many questions were answered incorrectly, subtract the number of correct answers from the total number of questions.
