# Math

posted by .

Professor Smith gives only a midterm exam and a final exam. The average is computed by taking 1/3 of the midterm exam score and 2/3 of the final exam score. To get a “C” or better students must have at least 70 semester average.

If Laura scored only a 59 on the midterm, what is the minimum score would she have to get on the final in order to get a C or better?

• Math -

(1/3)(59) + (2/3)F ≥ 70
times 3
59 + 2F ≥ 210
2F ≥ 151
F ≥ 75.5

check: suppose she got 80
Final mark = (1/3)59 + (2/3)80= 73 , OK
suppose she got 75
Final mark = 59/3 + (2/3)(75 = 69.666... which is < 70

## Similar Questions

1. ### Statistics

In Professor Smith's statistics course, the correlation between students' total scores before the final exam and their final exam scores is r = 0.67. The pre-exam totals for all students in the course have a mean of 275 and a standard …
2. ### algebra

students in a biology class just took a final exam. a formula for predicting the average exam grade on a similar test t months later is. s(t)=78-15log(t+1) (a)find the students average score when they first took the final exam. (b)what …
3. ### College Algebra

Matt scored 75 on the calculus midterm. If the final exam counts twice as much as the midterm exam, then for wht range of scores on the final would Matt get an average between 81 and 92?
4. ### statistics

In a large class, there were 220 students who wrote both the midterm and the final exam. The standard deviation of the midterm grades was 14, and that of the final exam was 20. The correlation between the grades on the midterm and …
5. ### Statistics

In Professor White’s statistics course the correlation between the students’ total scores before the final examination and their final examination scores is r = 0.9. The pre-exam totals for all students in the course have mean …
6. ### English

Hello all. I speak very little of english. My teacher emailed me this and I wan't to make sure I understand correctly. [The final exam will only cover material since the midterm.] this means that final exam will ONLY cover what we …
7. ### VNS,Math

Mr. Bobby bought 50 shares at \$60, and 2 months later purchased 25 shares a \$56.at what price should he purchase 25 additional shares in order to have an average price \$58 per share?
8. ### statistics

Professor Smith gave a final exam in her history class. The scores on the final exam are normally distributed with a mean of 75 and a standard deviation of 6. If Professor Smith wishes to give A’s to the top 4%, what would be the …
9. ### JAVA PROGRAMMING

im new to java and this is my first assignment can anyone help me solving it: compile the class final grades, based on the students’ scores obtained in the classwork, mid-term, and final exams. According to the course syllabus, the …
10. ### math

In a course a student's final exam is weighted as heavily as his mid term exam.if a student receives a score of 84 on his final exam 90 on his midterm,what is the average for the course?

More Similar Questions