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Edexcel S2 - 27th June 2016 AM Watch

  • View Poll Results: How did you find the Edexcel S2 exam?
    Very hard
    145
    14.71%
    Hard
    331
    33.57%
    Normal
    293
    29.72%
    Easy
    152
    15.42%
    Very easy
    65
    6.59%

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    (Original post by the-anonymous-me)
    Does anyone remember how many marks the area of the circle question was??
    4 marks
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    7
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    (Original post by qqa85781521)
    Q6 I got N=57
    Same here!
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    9
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    Got literally everything wrong bye university


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    If i got 93, 93, 91 last year and assuming I got 180 from c3/c4, how much ums would I need for an A*?
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    how did you do the hypothesis question?
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    for area of circle
    A=PI(r^2)
    E(A)=PI * E(R^2)

    e(R) = 7 (9+5 / 2 =7)
    e(R^2) integrate R/4 *R^2

    r^4/16 (limits 9 and 5)
    9^4/16 - 5^4/16 =371 therefore E(R^2)= 371
    area then is 371* PI

    my thoughts
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    (Original post by NamelessPersona)
    Dont worry I messed up on it and forgot to multiply my a by 3, only realised 10 mins after exam
    If you don't mind, did you solve the "bin" question? The expected price per full bin or something, I got the right answer but I still don't understand cuz initially I thought I need to use E(X) which is the expected value of staples and I don't see why that's wrong
    Actually I wrote down both answers so examiner can decide... lol
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    (Original post by Rey Mysterio)
    If i got 93, 93, 91 last year and assuming I got 180 from c3/c4, how much ums would I need for an A*?
    23
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    (Original post by Rey Mysterio)
    If i got 93, 93, 91 last year and assuming I got 180 from c3/c4, how much ums would I need for an A*?
    23 UMS
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    (Original post by SHJBHB)
    Q3b) is not 0.75, 10 is outside the boundary so 7<X<9 is 0.5
    I agree!
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    (Original post by angelitajin)
    If you don't mind, did you solve the "bin" question? The expected price per full bin or something, I got the right answer but I still don't understand cuz initially I thought I need to use E(X) which is the expected value of staples and I don't see why that's wrong
    Actually I wrote down both answers so examiner can decide... lol
    http://www.thestudentroom.co.uk/show...9#post66137149
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    In the Sampling Question, what did everyone get for the last part where it said find the MINIMUM VALUE OF N ???
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    How do you prove b=8?
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    (Original post by buci98)
    f**k you
    dude don't quote him. His post will get removed soon

    Edit your post now and remove the quote
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    (Original post by Danllo)
    In the Sampling Question, what did everyone get for the last part where it said find the MINIMUM VALUE OF N ???
    57
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    (Original post by Dannyfire)
    How do you prove b=8?
    Differentiate CDF twice and equate to 0 , subbing in x=8/3
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    (Original post by NamelessPersona)
    57
    Wasn't it 56 ???
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    (Original post by Danllo)
    Wasn't it 56 ???
    ln(0.1)/ln(0.96) < n
    56.4 < n
    n = 57
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    (Original post by lara24)
    I got k as 1/19 can someone please put up a solution I didn't know how to do it
    Am I the only one who got that k = 1/40?
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    15
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    can some one please write the function for the last questions please
 
 
 
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