Sally answered 90% of the math test questions and 80% of the history test questions correctly. If each test had 50 questions, how many questions in all did she answer correctly?

I think that she answered 85 questions in all that were correct. Am I right?

correct

Right.

Thanks

85 To find the total number of questions Sally answered correctly, we need to calculate the number of questions she answered correctly on each test separately and then add them together.

For the math test, Sally answered 90% of the questions correctly. To calculate the number of questions she answered correctly on the math test, we multiply the total number of questions on the math test (50) by her accuracy rate (90% expressed as a decimal):

Number of questions answered correctly on the math test = 50 * 0.9 = 45

So, Sally answered 45 questions correctly on the math test.

Similarly, for the history test, Sally answered 80% of the questions correctly. To calculate the number of questions she answered correctly on the history test, we multiply the total number of questions on the history test (50) by her accuracy rate (80% expressed as a decimal):

Number of questions answered correctly on the history test = 50 * 0.8 = 40

So, Sally answered 40 questions correctly on the history test.

To find the total number of questions Sally answered correctly, we add the number of questions she answered correctly on the math test and the history test:

Total number of questions Sally answered correctly = 45 (math test) + 40 (history test) = 85

Thus, Sally answered 85 questions correctly in all.