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    Guys, I've calculated the mean raw marks needed each for 80% (A) 90% (A*) and 100% for both C3 and C4.

    I took the mean of each of the raw marks for those percentages between the year 2010-2014

    Here are the means:

    C3

    80% : 59.67
    Range : 57-63
    (standard deviation for 80% on C3 is 1.9)

    90% : 66.33
    Range: 64-69

    100% : 72.78
    Range: 71-75



    C4:

    80% : 56.44
    Range: 53-65

    90% : 62.44
    Range: 58-70

    100% : 68.11
    Range: 63-75
    (standard deviation on 100% for C4 is 4.5)

    Since a lot of you said C3 was hard, I guess it will be on the lower range of boundary marks
    and vice versa on C4
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    (Original post by George1231)
    70
    That's too high. I would guess 67
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    can some one pleaseee do the sin2q question. I want to know how to do it
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    (Original post by Moskarasoul)
    can some one pleaseee do the sin2q question. I want to know how to do it
    Substitute the parametric equation into the normal equation.
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    (Original post by Moskarasoul)
    can some one pleaseee do the sin2q question. I want to know how to do it
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    (Original post by ubisoft)
    That's too high. I would guess 67
    So you think A* will be around 62
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    (Original post by George1231)
    So you think A* will be around 62
    Yeah
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    (Original post by George1231)
    So you think A* will be around 62
    Not complaining if it is!


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    (Original post by CD223)
    Not complaining if it is!


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    Nor am i hopefully i can get an A* but i really don't think 62 will be the boundary considering people found it easy.
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    (Original post by ubisoft)
    Yeah
    the last time people found a c4 exam nice was june 2010 after then its been considered a hard paper.
    http://www.thestudentroom.co.uk/show...1304582&page=9 That was 67 for an A* and 71 cap for 100ums. So i doubt 62 will be an A*
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    (Original post by student0042)
    This person has written BE is length = ½AC, when it should be DE. Therefore the other value of µ should have been 6.
    Is BE not the same length as DE as E is the midpoint of BD?
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    (Original post by HenryC0302)
    Is BE not the same length as DE as E is the midpoint of BD?
    They are the same length, but I believe the other coordinate of B should be at the other side of E, not the other side of B.
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    (Original post by George1231)
    the last time people found a c4 exam nice was june 2010 after then its been considered a hard paper.
    http://www.thestudentroom.co.uk/show...1304582&page=9 That was 67 for an A* and 71 cap for 100ums. So i doubt 62 will be an A*
    That normal cutting the curve again was a hard question, I think very few people must've got that.
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    (Original post by ubisoft)
    That normal cutting the curve again was a hard question, I think very few people must've got that.
    Yes i agree i thought there was some tricky questions but the overall response suggests the boundaries will be high.
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    Thank you!
    (Original post by fotevaf)
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    (Original post by George1231)
    Yes i agree i thought there was some tricky questions but the overall response suggests the boundaries will be high.
    Maybe, but anyway I know I've got an A*, 100ums is just extra, if I don't get it then doesn't matter really.
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    (Original post by Moskarasoul)
    Thank you!
    I did it up to sinq= -3/4 and sinq=1/2

    but then i just sin inverse'd it and i rejected one of the values

    how many marks do you think that'll get me?
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    (Original post by ubisoft)
    Substitute the parametric equation into the normal equation.
    thanks

    I did it up to sinq= -3/4 and sinq=1/2

    but then i just sin inverse'd it and i rejected one of the values

    how many marks do you think that'll get me
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    (Original post by fotevaf)
    I really need an A* too

    and I was sick on C3
    I ended up doing mistakes that I'd practised many times before
    for example on the graphs and I even missed the secx by accident..

    I literally didn't see it and integrated xsqrt5 or something along those lines.
    that's why I really need 100% for me to have more than a ._ chance of an A*

    anyway

    um according to last year's boundaries
    your mark of 62 = 96% UMS

    Attachment 423363

    depending on how you did in c3
    you have a good chance
    basically, you need to have gotten at least 84%

    um that's also depending on if this year's boundaries are similar to last years

    I guess last year wasn't too hard either so I thought it would be similar

    Last year was 54 = 80
    59 = 90
    64 = 100
    Ah ok thanks for doing this for me, really appreciate it what'd you think you got on core 4? if you don't get the A* like you miss it by a few ums do you think the university will understand you perhaps had a bad day? :/ any advice about how to stop worrying and not let it affect my other exams? :/
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    (Original post by ubisoft)
    Maybe, but anyway I know I've got an A*, 100ums is just extra, if I don't get it then doesn't matter really.
    What do you think you've got on both papers?


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