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Júnior Certificate Strand 1 - Nível Ordinária - Probabilidade e Estatística
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  • Nota de Estudos
  • Rever Tópicos
    Manisha S.
    GB
    Manisha S.

    That was ok.

    Amy N.
    GB
    Amy N.

    Can anyone help me understand how to work out the second half of the question.

    Steffa F.
    GB
    Steffa F.

    confused idk what i just learnt had to do other research elsewhere to get it

    Georgina O.
    IE
    Georgina O.

    ok so how did you get those signs and 56?

    Iris Y.
    TT
    Iris Y.

    O.O i don't get the 56 part.....

    David W.
    AU
    David W.

    I can't see much point in the tutor providing an unexplained formula, then saying she looked up the answer in an unspecified book! However, I did manage to arrive at the answer 56 with the help of Google. Here's how: Another way of writing her formula (that works on my screen) is C(n,r), which denotes the r-combination of n objects. C(n,r) = n!/(r!(n-r)!) (trust me!) So, if n=8 and r=5, we have: C(8,5) = 8!/(5!(8-5)!) = 40320/720 = 56 (QED). But I'm not sure why the tutor didn't explain that.

    Jodie L.
    GB
    Jodie L.

    I am having problems trying to find where the module even is??

    Steven T.
    GB
    Steven T.

    if this is the basic course i dread to think what's in store for the next level. just throwing a number out of an unspecified book doesn't teach anything, just serves to confuse. how can you find an understandable explanation to get to 56.

    Steven T.
    GB
    Steven T.

    https://youtu.be/Rpb8KD1HQGc how it comes to 56 credit to john redden

    Bret I.
    flag-default-icon
    Bret I.

    Worst explanation ever for the second part. By the way I saw someone posting on here that 8 X 5 = 56...it doesn't it equals 40.

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