Question
Serenity earned a grade of 39, percent39% on her multiple choice science final that had a total of 200200 problems. How many problems on the final exam did Serenity answer correctly?
Answers
GPT-4o mini
To find out how many problems Serenity answered correctly, we can use the percentage she earned on her final exam.
Serenity earned a grade of 39%, which means she correctly answered 39% of the total problems on the exam. The total number of problems is 200.
To calculate the number of problems answered correctly, we use the formula:
\[
\text{Number of correct answers} = \text{Total problems} \times \left(\frac{\text{Percentage}}{100}\right)
\]
Substituting the values:
\[
\text{Number of correct answers} = 200 \times \left(\frac{39}{100}\right)
\]
Calculating this gives:
\[
\text{Number of correct answers} = 200 \times 0.39 = 78
\]
Therefore, Serenity answered **78 problems** correctly on her final exam.
Serenity earned a grade of 39%, which means she correctly answered 39% of the total problems on the exam. The total number of problems is 200.
To calculate the number of problems answered correctly, we use the formula:
\[
\text{Number of correct answers} = \text{Total problems} \times \left(\frac{\text{Percentage}}{100}\right)
\]
Substituting the values:
\[
\text{Number of correct answers} = 200 \times \left(\frac{39}{100}\right)
\]
Calculating this gives:
\[
\text{Number of correct answers} = 200 \times 0.39 = 78
\]
Therefore, Serenity answered **78 problems** correctly on her final exam.