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OCR (Not MEI) S1 Wednesday 8th June 2016

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Original post by catwat99
How?? I did (3x2x1x2)/7P4


Isn't it because of the repetitions it's over 210
Original post by Breynolds2671999
I thought i did it wrong, can't believe i actually got it right :biggrin:


thats was i did!! omd i thought i was wrong, does anyone remember wat answer came out?
Original post by RochL
S2g im only person who got 2/35 for ABBA 😂😂 what was the actual answer?

I got that too
for the barbara question, did anyone else get 1/210?
Original post by catwat99
How?? I did (3x2x1x2)/7P4


i did same as you but over 7c4 as those were the total ways in which the 4 cards could be selected...... i thought
For the second part of the 1st question, could you use binomial ?


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so for the ABBA question, wat was the actual answer??
Original post by Jamesk123
I got 2/35


I was unsure but asked my teacher who got 1/70 same as me and so did one of my friends but there also seem to be a lot of other answers out there so I am unsure
Original post by student199919
for the barbara question, did anyone else get 1/210?


No i got 1/210 but there were multiple a, b and r's so i did 1/210 x 3!2!2!, probably got it wrong but it is only 1 mark
(edited 7 years ago)
Original post by student199919
for the barbara question, did anyone else get 1/210?

Yes
who thinks this years paper was harder than last years?
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Ozil5
8
Original post by Ella rivers1
For the second part of the 1st question, could you use binomial ?


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Yeah i think you were meant to, i did anyway
Reply 132
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sen99
7
How do you do the standard deviation question and what was the answer
Original post by Ozil5
Yeah i think you were meant to, i did anyway


wat was the question?
Also did anyone get 146.5 for the mean of the apples?
Original post by StruanCaughey
I was unsure but asked my teacher who got 1/70 same as me and so did one of my friends but there also seem to be a lot of other answers out there so I am unsure
I got 7C4 as the total amount =35
And then 2! X 2! = 4 so 4/35
How did you work out the box plot question?
For the question with 9<X<20 I did P(X<20) - P(X<10), which is the same as (1-P(X>19)) - (1- P(X>9)) then just work it out ...

Is that right?
Original post by kassy12324
How did you work out the box plot question?


149-140
Original post by Breynolds2671999
No i got 1/210 but there were multiple a, b and r's so i did 1/210 x 3!2!2!, probably got it wrong but it is only 1 mark


I did exactly the same and I don't see why it's wrong?

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