Math - average grade

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Does anyone know how to calculate average point grade?
I have the following data:
grade D - 2 students - 4,9 percent
grade C - 6 students - 14,7 percent
grade B - 12 students - 29,2 percent
grade A - 21 students - 51,2 percent
What is the average grade?
This is NOT my homework and I am not going to school!I am doing a research about anxiety and I need to calcualte this!
So please some help!

  • Math - average grade -

    You have to assign a value to A,B,C,D. Since I don't know the grading scheme you have, I will make up one:

    A=4.0
    B=3.0
    C=2.0
    D=1.0
    F=0
    avg grade=sum of values*percent
    = 1.0*.049+2.0*.147+3.0*.292+4.0*.512
    I get 3.27

  • Math - average grade -

    Assign numbers to grades like 1 = D and 2 = C and 3 = B and 4 = A
    The sum of all the grades divided by the number of students.
    [ 2*1 + 6*2 + 12*3 + 21*5 ] / [2+6+12+21]

  • Math - average grade -

    thank you! you saved me :)

  • science-average grade -

    you need to start studying and get A's and high B'son your tests that's all i have to say by the way im polish, my name is Polry Sanghen, i need to tell you something i think im in love with you boiii

  • science-average grade -

    you need to start studying and get A's and high B's on your tests that's all i have to say by the way im polish, my name is Polry Sanghen, i need to tell you something i think im in love with you boiii

  • Math - average grade -

    you need to study real hard atleast 30 minutes okay honey we need to bring good grades im italian and my name is Belle E. Flopp love u :-}

  • Math - average grade -

    I have a 90 average i just got a 50 on my mid-term what is my grade average?

  • Math - average grade -

    I have a 82 average and got a 95 on a test what is my average now?

  • Math - average grade -

    A student's grade in a course is the average of 4 test grades and a final exam that is worth twice as much as each test. Suppose a student has test grades of 89, 88, 83, and 94. Write an equation to model this situation where xis the student's grade on the final exam and yis the student's average for the course.

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