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    (Original post by XBen1999)
    What did people get for the question where it said what is the p of X equaling each other and how did you do it
    I thought x could be 00 or 11 or 22 so i did the prob of getting 0 squared add prob of getting 1 squared add prob of getting 2 squared
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    (Original post by catwat99)
    I got 1/70 for the ABBA question??
    Yeah same! It's wrong tho
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    (Original post by Breynolds2671999)
    Same, just did ((1x0.6 + 17)) + ((2x0.6 + 17))...... and i think i got that.
    yeah i didnt know how else to work it out so typed it all out in the calculator aha
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    I got 3/35
    (Original post by cc262626)
    Yeah same! It's wrong tho
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    (Original post by cc262626)
    Yeah same! It's wrong tho
    oh, why?
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    (Original post by XBen1999)
    What did people get for the question where it said what is the p of X equaling each other and how did you do it
    P(X=0)^2 + P(X=1)^2 + P(X=2)^2, found each individual probability just using the binomial formula
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    (Original post by iamDev)
    I thought x could be 00 or 11 or 22 so i did the prob of getting 0 squared add prob of getting 1 squared add prob of getting 2 squared
    Yeh I did that but I think I got the wrong answer how many marks will I lose?
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    S2g im only person who got 2/35 for ABBA 😂😂 what was the actual answer?
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    For the probability Q with x<9<20 I just did sum of probability a for 10-19 ... And I got like 0.093 what were u supposed to do


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    (Original post by student199919)
    yeah i didnt know how else to work it out so typed it all out in the calculator aha
    Same i got so confused , i just wanted a nice easy working oit a regression line and we got that
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    (Original post by cc262626)
    Yeah same! It's wrong tho
    I'm pretty sure it's right? I got that but wrote it as 0.0143
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    (Original post by duncant)
    1/105 probability to get ABBA? only one im not sure on
    I got 2/35
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    (Original post by Shanie_e)
    I'm pretty sure it's right? I got that but wrote it as 0.0143
    Are you sure?! Loads at my school said was wrong
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    (Original post by h3rmit)
    P(X=0)^2 + P(X=1)^2 + P(X=2)^2, found each individual probability just using the binomial formula
    I thought i did it wrong, can't believe i actually got it right
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    (Original post by Ella rivers1)
    For the probability Q with x<9<20 I just did sum of probability a for 10-19 ... And I got like 0.093 what were u supposed to do


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    .8^9 - .8^19
    The same thing was in a past paper, but I couldn't remember what to do with the indices so I just put .2(.8^9 + .8^10 ... + .8^19) in my calculator
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    (Original post by cc262626)
    Yeah same! It's wrong tho
    How?? I did (3x2x1x2)/7P4
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    If I got the formula for variance wrong, will i get error carried forward for the next question?
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    Yeah same ! But I ended up with wrong number lol


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    (Original post by Ella rivers1)
    For the probability Q with x<9<20 I just did sum of probability a for 10-19 ... And I got like 0.093 what were u supposed to do


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    I just worked out the probability for 10, 11, 12, 13, 14, 15, 16, 17, 18 and 19 and added them together.
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    (Original post by Shanie_e)
    I'm pretty sure it's right? I got that but wrote it as 0.0143
    my first answer was 12/35 because i did something like
    (3C1 X 2C1 X 1C1 X 2C1)/7C4 and got 12/35. then i wanted to see if i got the same with another method and so i did 3/7 x 2/6 x 1/5 x 2/4 and got 1/70. so im not sure
 
 
 
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