To receive a B in a course, you must have an average of at least 80% but less than 90% on five exams. Your grades on the first four exams were 95%, 79%, 91%, and 86%. What range of grades on the fifth exam will result in a B for the course?
Added by Jamie C.
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Since there are 5 exams, and we need an average of at least 80% but less than 90%, we can calculate the total percentage needed for a B as follows: Lowest total percentage for a B: $5 \times 80\% = 400\%$ Highest total percentage for a B: $5 \times 90\% = Show more…
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