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    (Original post by kprime2)
    Should be at least 90ums, I thought this paper was tricky
    omg are you serious? Im happy with 80 ums but if I get more ofc Id be even happier
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    (Original post by harry speed)
    mean was 240 so s.d was 40 which gives the 206 , i got 206.4 any idea why and should it still be full marks got -0.84 for z value
    I also put -0.84, but still got the 206. Hopefully it is full marks, I think the mark scheme allows values between.
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    Thank you for this. Think I've done fairly well
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    (Original post by revise_or_fail)
    Ok basically, you need to find P(D intersect B) and P(D intersect R {not b}) so you can use the probabilities in first part because it said estimate. So I just did a ratio as P(B) = 0.33 +0.27 = 0.6 and P(B intersect D) = 0.27 so I did (0.27/0.6)*40 = 18 people.
    Then you knew that just P(R not B) = 0.22+0.15 = 0.37 and P(R {not B} intersect D) = 0.15 so i did (0.15/0.37)*37 = 15 people
    So the total people who had dinner were 18+15 = 33
    so P(Dinner) = 33/77 = 3/7
    You can only do this if the new probability given 40/77 or 0.52 is equal to the one given earlier in the question.
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    Guys I am speculating grade boundaries to be about 50/51 for a B grade and 56/57 for an A grade. My reasons being quite a lot of people seem to have lost out on the venn diagram worth 13 marks and then some other places to, what is the genral consensus on this; accurate or not.
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    Are the written solutions out yet?
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    (Original post by Dark knight123)
    Guys I am speculating grade boundaries to be about 50/51 for a B grade and 56/57 for an A grade. My reasons being quite a lot of people seem to have lost out on the venn diagram worth 13 marks and then some other places to, what is the genral consensus on this; accurate or not.
    I don't think the grade boundaries for an A have ever been so low, i might be wrong though i would have thought 58/59 for an A but not sure
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    (Original post by SashaWicks)
    I don't think the grade boundaries for an A have ever been so low, i might be wrong though i would have thought 58/59 for an A but not sure
    The lowest they have ever been is 55 in June 2010
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    (Original post by Dark knight123)
    The lowest they have ever been is 55 in June 2010
    Okay, obviously never saw that one
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    Yoo, i know im a couple days late, but how do you get Syy
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    (Original post by Katieramsay)
    How did everyone get the probability for Sarah and Rebecca wining. I got 0.4625 and 0.4450 so clearly I've got it wrong but I don't understand how?? 🤓🤓
    I got the same as you! Worked it out twice as well and checked it, so very confused how we are wrong, still thinking about this lol
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    Name:  image.png
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Size:  266.5 KB
    (Original post by boylubda)
    Yoo, i know im a couple days late, but how do you get Syy
    See the attached image....
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    (Original post by brokeins1)
    Name:  image.png
Views: 319
Size:  266.5 KB

    See the attached image....
    Haha got it, thank you
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    (Original post by Dark knight123)
    Guys I am speculating grade boundaries to be about 50/51 for a B grade and 56/57 for an A grade. My reasons being quite a lot of people seem to have lost out on the venn diagram worth 13 marks and then some other places to, what is the genral consensus on this; accurate or not.
    I'd say 57 for A grade and B grade 50/51 yh
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    (Original post by OloMed)
    Are the written solutions out yet?
    Here is my mark scheme

    https://1drv.ms/b/s!Art0vQqZgjKy43DaE6XtYVXM0nq6
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    Superb.
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    does anyone know what was the question for 4dii or how you got 15/37
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    (Original post by joyalshenny)
    does anyone know what was the question for 4dii or how you got 15/37
    (ii) P(D|R ∩ Bʹ ).

    On the bottom of the fraction put prob of being R ∩ Bʹ. On the top put prob of being in R ∩ Bʹ and in D.
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    Does anyone have the june 2016 IAL S1 mark scheme? Or model answers.. its not available online
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    (Original post by xxdrwxx)
    Does anyone have the june 2016 IAL S1 mark scheme? Or model answers.. its not available online
    All the June 2016 IAL except the S units are now freely available on the Edexcel website, here:
    http://qualifications.pearson.com/en...ries=June-2016

    I'm therefore happy to put the S1 MS on here.
    Attached Images
  1. File Type: pdf 1606_IAL_S1 June 2016 MS.pdf (558.0 KB, 102 views)
 
 
 
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