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Math Help - What grade do I need?

  1. #1
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    What grade do I need?

    I wasn't sure what section to put this in....

    Can someone tell me what I have to make on my final to get an A?

    Attendance 5% = 95
    Case Studies (3) 20% = 100, 95, 95
    Exams (3) 75% = 86, 80 (the final is the last exam so it's 25%
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by redraider717 View Post
    I wasn't sure what section to put this in....

    Can someone tell me what I have to make on my final to get an A?

    Attendance 5% = 95
    Case Studies (3) 20% = 100, 95, 95
    Exams (3) 75% = 86, 80 (the final is the last exam so it's 25%
    what grade is an A? 90%?
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  3. #3
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    yes
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  4. #4
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by redraider717 View Post
    I wasn't sure what section to put this in....

    Can someone tell me what I have to make on my final to get an A?

    Attendance 5% = 95
    Case Studies (3) 20% = 100, 95, 95
    Exams (3) 75% = 86, 80 (the final is the last exam so it's 25%
    so for attendance, you got 95% of the possible attainable points, so you have:

    0.95 * 5 = 4.75% from this section

    for case studies, you have, (100 + 95 + 95)/300 * 100 = 96.67 % of the possible points, so you have:

    0.9667 * 20 = 19.33 % from this section

    so now you have: 4.75 + 19.33 = 24.08 % so you need an additional 65.92% to get an A.

    so we want [(86 + 80 + x)/300]*75 = 65.92

    => [(86 + 80 + x)/300] = 65.92/75 = 0.8789
    => 86 + 80 + x = 300*0.8789 = 263.67
    => x = 263.67 - 86 - 80 = 97.67

    yup, those 80-something percents are going to cost you. you need a 97.67, let's say 98% on the final to get an A
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  5. #5
    Senior Member ecMathGeek's Avatar
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    Quote Originally Posted by qbkr21 View Post
    Here is how he grades:

    Final Grade = 60% Average Test Scores + 20% Final Exam Score + 5% Calculator Labs + 15% WebWork

    My Grades:
    3 Given Tests:

    1st Test:100%
    2nd Test:100%
    3rd Test:96%
    Average: 296/300 = .98666
    Of total: .98666*.6 = .592 = 59.2%

    3 Given Calculator Labs:

    1st Lab:100%
    2nd Lab:100%
    3rd Lab:100%
    Of total: 1*.05 = 5%

    Webworks Grades

    Scored 100% on every one!
    Of total: 1*.15 = 15%

    Final Grade that would keep me from getting an A:?
    Total: 15% + 5% + 59.2% = 79.2%

    To get an A, you need another 10.8%. Out of the 20% possible on the Final, you need only 10.8/20 = .54 = 54% on the Exam. Anything less and you get a B!
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  6. #6
    Senior Member ecMathGeek's Avatar
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    Quote Originally Posted by Jhevon View Post
    Talk about genius! how brilliant do you have to be to be able to screw up on a final with a 54% and still walk away with an A?
    I'd like to make a minor adjustment to my calculation. Since most teachers round up, you technically only need about 10.3% to get you a 89.5% in the class (which is rounded to 90%). Therefore, you only need

    10.3/20 = .515 = 51.5%

    I hope you can manage that!
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